Who said anything about a stock motor?
Mines 34GTR is where its at. Although it's fairly old too so could probably be improved upon.
Last factory 34GTR was 2002.
If the prices climb more than 35s, then I'ld probably "just" get a 35. The 35 is superior (performance wise) in every way. The 34GTR is nostalgic though. At the end of the day though, it all depends what you want to do. If you want a car for show or for street or for whatever.
You must be rich to have a performance car to just sit there though!