Whoa!
First of all,are you a current owner of either the 350or 370?
Or,are you just shopping around?
Of course,many opinions on your question are subjective. However,there
are some opinions that are based on true fact.
I ask,what will be the purpose or use of the car?
Just a daily driver. Or,do you have an eye on performance?
What about styling?Both cars are reincarnates (especially the 350)of
the original 240Z lineage.
Keep in mind that Nissan(earlier ,Datsun)has a track record of producing a
great original version. Then in following models,weight them down and most
times,add body and styling parts that detract from the original design.
If you are a purist at heart and feel, a bit less than 300hp(maybe 255-260whp)
works(it is pretty peppy),go with the 350Z. You want more and an interior thats
more finished,go with the 370.
I myself have never completely warmed up to the 370.
Of course, I have upgraded my 350 to get about 330whp and added various body
and interior mods to make it look new.
Budget is indeed a factor. Earlier 350's(03-05)can be bought for reasonable prices.
Even though,I'd find one that was unmodded,low mileage.
In summary, the 370 is more finished but does not quite have the look of the original.
Just sayin...