-7s are the same as 34 n1s
33 n1s are laggy pos
If you're happy with 300kw then you want -9s as they are basically an updated -7, they make more power but have extremely similar spool times. They are however slightly more expensive. -5s need something to help wake them up. Lots of boost is ideal but obviously not for a standard motor. I use poncams. E85 would help massively too. -5s+E85 would be the perfect street setup on a gtr IMO.
-7s or -9s are the turbos you want.