If you had the 350Z and loved it, you won't be disappointed with the 370Z. Interior is much improved over the 350Z, and I still like it very much till this very day. Since you seem to have experience in the modding world, the 370Z has pretty good support.
Depending on your budget, an '09 can be bought for under $25k. There are several turbo options, and GTM's MHI TT kit seems to hit the spot when it comes to price. It'll definitely get you around 500 whp, which is plenty of power. I'm at 450 whp, and it's enough to shred tires with a big fat grin on my face. Power aside, this car sounds great with an aftermarket exhaust. If you want nice and deep sounding without the rasp, it is definitely possible.
So for starters, look at a TT/SC kit for around $5500-7500, 3" exhaust, oil cooler for around $450, aftermarket clutch/flywheel kit, and heavy duty slave cylinder (stock ones will fail), and gauges.
Speaking of tires, deep wheels with appropriate offset, fat tires, and a slight drop FTW!
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