I think it's kinda funny when people debate over cars that they have probably never seen. I love this FR skyline thing, people talk about FR skylines as if they're somehow rare. Nearly all Skylines are FR, I saw 2 GTR's today and at least a couple of dozen normal Skylines. Also, a G35 isn't a Nissan, the Nissan model is the V35 Skyline. As for Truenos, there's nothing wrong with them, they have decent power for being so small and power isn't everything - just because something's quick in a straight line doesn't make it quick round a corner and races are won and lost in corners not straights.
It doesn't matter what you start with, it's what you do to it that counts. The other weekend I watched a Starlet with a CA18det clean up a couple of R32 GTRs, an RX7, an EVO, a Primera, a Z31 300ZX, an AE86, a GTST, Some Honda things and a bunch of other cars. Enough money can make pretty much any car quick.