from Nissan I owned 2 350's de/hr motor, 1 g35 coupe, currently own an 05 fx35 sport, and an 09 m35s. It's not that I love infiniti but they offered the lowest leases/financing at the time. I believe that every bmw counterpart to infiniti is superior in driving dynamics. So I would only buy an infiniti over a bmw only if there is a significant price difference. My biggest gripe is how artificially heavy nissans feel in order to mimick bmw
As for the c300/50 I hate them as well. In fact I hate even riding in it. The interior and driving dynamics are identical to my chrysler 300srt8. It's so numb and not confidence inspiring.
I've never really considered the Audi's until the new a3 tdi came out but I don't see them in the same class as bmw, mercedes, or infiniti. They are front wheel drive biased w/ tiny 4cyl motors.
e90>c300>g37>a4 but I would buy any one of those cars b/c it all comes down to opportunity cost
