How about a custom made Rolex 1500 date? 34mm... Not too big, but not too small either. Very simple aesthetics...
Basically, this watch would consist of a genuine case (purchased for $150.00; will probably include dial, crystal, bezel, crown tube), crown ($30), ETA 2824 ($60), hands ($40), datewheel overlay, and 19mm Oyster strap (price varies).
The result would be a completely genuine watch on the exterior, with an ETA beating inside.
Or, if you like a little larger, you can go with a 36mm DateJust like this 16234 I recently put together...
This would open up the doors to more dial options (including the white ones with roman markers), bands, case sets, etc.
Price is about the same to build....