Here's my $0.02
If you're looking for a sporty-ish sedan with a manual transmission... the list is pretty short and mostly German. We recently looked at most of them, specifically 2013 models of the BMW 328i, Audi A4, Lexus IS, Acura TSX, Infiniti G. I bleed BMW blue-and-white but wanted to look at all the options cause things change a lot in a few years.
BMWs are slowly becoming more expensive than anything else (more than Audi and MB). Audi interiors are beautiful and they've added more content for the same price for the 2013 A4. Lexus only offers a manual in the IS250 and you can't even get electric seats with it (when did manual transmissions and electric seats become mutually exclusive) and for 2013 there's no manual at all. The TSX used to be fun, but it's way too soft now, clutch, steering, and shifter are all really light. The Infiniti interior is missing something for me.
As someone posted earlier, you just have to to look at the cars, sit in them, and drive them, not just once, but a few times and then decide from there. Throw any any preconceived notions and go with your gut.
btw, ended up with the A4.
Now if only you could put an inline-6 in an A4, then that would be the perfect car for me. There's nothing like the sound of a NA I6. Although the power of the TT I6 in the 335i is intoxicating, i'm not sure it sounds as good as the NA I6. However, the V8 in the M3 might do the trick, sounds totally different but it revs to 8000! It's all about the sound of the engine for me as it revs to redline. My benchmark is like an F1 engine or any Ferrari, the sound is like priority 1 for my future garage queen, any suggestions?