Feedback about a few of my favorite cars

Viper:

It looks great, it sounds great, but it handles like a school bus.

Sold it.  I also didn't like how the gears were set up, and that it didn't have a 7 gear option.

Aston Matrin Vulcan:  

Looks great, sounds great, handles expertly, but fights me tooth and nail on acceleration once getting to 7,000 rpm.

Kept it, swapped the engine to the Viper motor; problem solved.

M3 GTR LE:

Looks great, handles expertly, doesn't sound like an M3 GTR.

Initially sold it, but bought it back.  New outlook, for me:  It doesn't sound like an M3 GTR so I won't treat it like an M3 GTR.

Saving up money to swap the motor with something fast.

BMW M3 2006:

Not a facorite car for me, but is useful.  

4.0 V8 swap (you know which one), adjusted the pitch / exhaust sound.  Bravo M3 GTR sound problem mostly solved.

R32 GTR:

Looks great, sounds great, has nice handling, but doesn't have swap options that I'm interested in.

Kept the car, kept the stock motor and threw some parts on.  It won't be able to compete in PvP, but it won't matter since I don't race to win anyways.

That's about it for me.  There's more cars that are favorites of mine, but I haven't bought them yet; I'll buy them when I can buy them, no rush.