Dirt Nasty
Go Kart Champion
I was in the same boat, except this was my list:
Audi A4 B8
Infiniti G37
VW GTI MK6
Drove G37 first. Had my eye on it for years and years. Then drove the A4... boring but nice. Drove the GTI and smiled from ear to ear every time I sat back in it to test drive it (total of 3 test drives before I purchased).
Talked to Audi service department. They're more expensive than VW/Honda/Infiniti. G37 has a world renowned engine but V8 style MPG. Audi wasn't fun and maintenance was expensive. VW was a perfect mesh between the 2. Still worried about long term reliability, but it's not like it's a BMW.
Drive it. Buy it. Smile every day you get in it. I do.
+1 to the audi. The A4 is so boring. My roommate has a B7 A4, Slow and boring. The GTI at least has soul.