Master Chrono today. Prob a repost, but I´m sure you can tolerate it Warning: Spoiler! (Click to show)
Beautiful RO Dual Time! A great looking watch and perfect for people that travel a lot. I gave that watch some very serious consideration...maybe next time. Enjoy it!
Does not quite compare with some of the other beauties that have been posted here as of late. Alas, I am but a lowly student.
A Speedy Pro is great watch and could be the cornerstone of what will eventually be a very nice collection. When I was in college I had one good watch, a GMT Master, and it was my do anything go anywhere watch.
Ah...I forgot you have a JLC Master Control. Definitely a fantastic watch. I agree with the combo of a Speedy Pro and a Master Control you have a watch that would be appropriate for any event. One of my best friends has a Speedy Pro. He bought one in the mid 90s and then traded it for another watch. Years later he really missed having one, so he bought another one about 7 or 8 years ago. I don't think he will make the mistake of letting that one go.
The Jumbo is fantastic! I love that watch...and of course its powered by the same caliber 2120, which is used in the Jules Audemars Extra Thin, which you are considering. The wormanship on the case is flawless and the movement is stunning to see through the display back. I have to try to remember to take a pic of the movement one of these days. Although, I like the wrist shot you attached with the white gold Jules Audemars, I'd probably go for the rose gold also. I only have 3 dress watches, but each one is in rose gold. I find it a nice change from white metals, as all of my sports watches/daily wearers are white metals. I've only ever purchased one watch in white gold and I decided that was a mistake. Rose gold watches with silver dials look great with anything, browns, blues, blacks, grays. I'm not sure what I would want for a next watch. I don't know if I'd look for something sporty or dress watch. I recently tried on the Piaget Altiplano 40mm round watch with subdial for small seconds at 10 o'clock and I really liked it a lot. Very elegant and understated but the subdial at 10 is a bit whimsical and unexpected. If I did that it would also be my first round dress watch (currently I have 1 thats rectangular, 1 thats square, and 1 thats asymetric). Oh well, I guess I will see what is released this year at SIHH and Basel before I start seriously considering my next watch.
Here is my Cartier Tank XL from the Privee Collection, which has a wonderful and unusual movement as its rectangular and not round. Most square or rectangular watches use a round movement as most companies have dozens of them that are used in their other watch cases. This movement was developed by Piaget and assembled and finished by Cartier. But mostly I posted this so you can see how nicely rose gold also works with dark grays or black.
I think at $6K, you would be looking at a pretty tired RO maybe from the 80s, in the no longer made 36mm size. All mens ROs are now 39mm or larger. Also, many of the older ones might have questionable maintenance and really terrible polishing jobs from unauthorized service shops (where the bezels have come back nearly round and all the beveled edged have been rounded off). I've seen some used/abused ROs that would cost a lot of money to put right, and wouldn't be worth your purchase. Its a watch thats really become appreciated by the watch buying public in the last 10+ years, but in the late 80s and early 90s resale value on them was weak and so people would often service them as cheaply as they could and on many pre-owned less expensive ones it shows. APs are not watches that I'd bring to the local watch maker (even one that says he works on Rolex and Omegas).
If I were working with a budget of $6K or less, I'd defintely look at a recent preowned Submariner or GMT, various JLCs in the Master Control series (I really like the Master Hometimes that were out until a few years ago) or a Reverso for a different shape, and I would also consider an IWC Pilot Chronograph or maybe a Mark XV (particularly on a bracelet...they are amazingly comfortable bracelets and really nicely made). A pre-owned IWC pilot chronograph or Mark XV can easily be had for under $4K. Obviously, the better the conditon of the watch the more it may cost you. It really depends on if you want something simple or with other functions. If you are really into Omega, I'd choose a Speedmaster Professional (although I don't know how you would feel about a manual wind) rather than an Aqua Terra. The Speedy Pro is probably their most iconic watch and a true classic. IMHO, the Aqua Terra is nice but not anything I'd choose...but thats just my 2 cents.
Good luck and let us know how your search goes!