My
:
Buy a 370Z.
Given they just did a redesign of the front end, you are looking at 2015-2016 for a new version. If they go lighter and cheaper, you aren't going to want one. If they go turbo, it will likely be 4-cylinder. The most desirable change is something more sexy with a turbo VQ (or the unlikely V8). However, this is going to come at a cost (~$45k for sport?)
For what a new Z will cost 2-3 years from now, you could have a twin turbo 2012 built exactly how you want it and drive it for a few years before the new ones are even released. That car would undoubtedly be better than any possible 2015-16 for quite a bit cheaper. Throw in the fact that we don't know what the car will be and the first two years will have "issues" (see steering lock, oil cooler, etc...) and I personally think it becomes more clear.
Or for the money, you could do a really clean LS swap in your 350Z
__________________
F.I. CF CBE | Avant Garde M310 | BC BR's | ONEighty | Status | EvoR | Stillen | Whiteline | B&M | Bespoke Details
Boosted Performance | Precision Turbo | Tial | HKS | Innovate Motorsports | Bosch | Treadstone | Walbro | UpRev | Depo