First off man, gotta learn how to use the search button. <----biggest thing
A decent coupe SHOULD go for around 1500 to 2k....pending, but since they are getting more popular expect the prices to be higher
Who cares if your car sounds like ass, as long as it makes more power, hell i wouldnt care. lastly, the reason people put s13 silvia fronts on because well....they like it

its all personal taste man, like i said though, research it all before you ask, because odds are it has beendiscussed before....