Nissan does make a damn fine engine. The 3.5L in my dad's old Altima SE-R was awesome, moved that thing quickly for a midsize sedan. Mated to a 6-speed manual, with the SE-R's exhaust + ECU retune, it was awesome. Factory rated at 260hp @ the crank, felt quicker than that, almost as quick as the STI that replaced it. Almost. Plus on the highway it could crank out way over 30mpg. Gotta love that VQ35DE engine.
Same thing holds true in my mom's car, the G37x coupe (and the G35x sedan that came before that). Another great car/engine. Honestly I'm surprised I haven't gotten in any trouble driving that car yet.... you put your foot down a little when leaving a stoplight and you're doing 60 or 70km/h in the blink of an eye.