if you want a good exhaust, that is cheap, and has a nice note... Standard exhaust, let the engine do the talking, save yourself the looks from the cops, what you could spend on the exhaust spend on the suspension, headlights, stereo...
Best exhaust i have had so far is Pacemaker extractors, 2.5 Cat pipes, stock cats, standard cat back... Does the job, with no drone and whine. and all you can hear is engine!
Oh and btw, stock exhaust is free.. another benefit!