I am bias towards the Z's since my first was an 83 280zx. I have owned 3 and the 370 is the most fun I have had. You have to ask yourself what is more important. on one hand the GT is easily modded to make great HP if that is what you are into, but it seems to me I see one every block I drive and for the exception of some badging, tires they all look the same unless you spend more for the roush, etc. the 370 on the other hand you rarely see especially going into the 3rd year of production dont know if it is because of the economy or just a smaller following either way I like that fact. To mod a 370 takes more time and money but if done correctly it will run with the big boys and without mods it still hangs with the V8 community ie GT and SS. If you go with the Z pay for the sport/touring package with Nav or the NISMO because IMO I see alot of people trying to make the base model look like them when they could have gotten one with all of this on it cheaper used. for example I got mine with only 10K and 6th months on it with everything for 30 grand. saved close to 12-15 after taxes over a new one and it still had that new car feel. I vote z, it is a fun car, good looks, has plenty of power and capable of making more all on a V6 engine. its not the size of the engine but how you use it that makes the difference.