I am exactly your dimensions. There are no fully canvassed suits available for 400-600 unless you really put some effort into it.
You can try and find a Corneliani on Sierra Trading Post, but I haven't seen one in a solid color other than black in 42R. The black ones sold for as little as $525 a couple of months ago.
Canali is fully canvassed and can be had on sale from dept stores like Bloomingdales, maybe for 600 a couple of times a year.
You could also go to Century 21 and compete with lots of other people of a common size.
Isaia (Enrico Isaia and Gianluca Isaia) are fully canvassed and occasionally available from STP for 700-800, but typically retail over $2000.
Alternatively, there is fused Polo Ralph Lauren (retail 1200 and up), Ralph Lauren Black Label (very slim), and Gian Luca (retail $1000) on eBay for 350-500 if you're willing to take some risk. These are good suits, and the Polo is easy to try on in a local store before looking on ebay. Sierra trading post sells Gianluca sometimes, and there are a couple of ebay sellers that have them. They are pretty slim on a 42R if you get a 52R euro size.
As far as the visible decorative pick stitching on the lapels, quarters and pockets, it's personal preference. I like it subtle and on the very edge of the fabric.