I think any dark strap would look fine with that watch dial. You should check out the sales corner on Timezone.com as there are a few sellers on their of reasonably priced watch straps.
I've bought several metal sets from Gilt that I like. I think they are usually from Link Up. $20 gets you about 6 pairs.
I also have a set from here, because I needed collar stays which were shorter than the standard that Link Up sells for spread collars:
I think that's a bit drastic and think that open button collars can look fine, they just won't look as good as with the top button buttoned and with a tie.
Try a shirt from express men, you can get them on sale for like 30-35, if you like slim cuts then they have some nice fitting shirts too but quality is nothing out of this world, what I found nice was that the shirts come with these metal collar stiffers, same as the typical plastic ones only metal and work great on my spread collar shirts, I only have 2 shirts from express men but I use those 2 sets of pins and switch then out to whatever shirt I wear, they're not too long so you get a nice roll on top and theres no magnet so they don't look weirdly stiff either but they are heavier than the plastic ones so no flying away collar look, ymmv.....
Thanks. Will stick with the shirts from Uniqlo right now as I like them. With added darts the fit on me is impeccable. And the reason why I want to stray away from OCBD is that when I get them darted, the middle darting typical of OCBD shirts causes upper blousing of my back. As far as collar stays I just want to minimize the "flying away" of spread collars as that is the only collar I enjoy wearing when I do sport a tie. So, here is to ordering a few collar stays and see how that goes.