Evo 5 cheap? How cheap? It is easy to see which other cars are
good in ver3, just go to your local arcade and see which cars are
popular and you will know. Anyway, although the RX8 is not
bad...but it is still not as godly as DC2 in ver2. So I think so
far I haven't seen or know any car that good enough to recommend to
you. You can try RX8 if you want.
I dunno about sil90...only know sil80, anyway...if you can't win a
stock trueno on usui, you may need some help on ID. Instead of
asking around which car is the best to use, why not find out which
car outlook or model or type that you like best and get that car
and stick to it. Although DC2 may be the god car in ver2, but I
don't like the outlook and the rear look...so I choose a car that I
like...both in outlook, rear look, model and type. And I am
sticking to it...cos car's performance are adjusted each time with
every different version, but if you can stick to a car which you
liked and not get sick to use it for any version, isn't it a better
way to choose your car? 
Anyway, I don't see much DC2 in ver3...hmm...wonder what happened
to all those DC2? COE expired already and all changed to a better
car perhaps. 
Good luck in choosing your favourite car. 