since your looking for opinions heres mine..

ive had steeda (borla stingers), magnaflow, magnaflow with x-pipe/no cats...pipes mid muffler, and now flowmaster classics...

for what your looking for the best sound with no drone might be the pypes mid muffler, problem was i could never get them to fit right without a rattle here or there..their is no room for error!!

the magnaflows were so quiet you might as well stay stock, not much difference

the steeda (same as stingers) were awesome but wifey wanted louder..no problem there!!

the flowmasters classics are by far the deepest, throaty sounding ( no rasp..just growl) and what i like the most...but there is a definete drone at 1700 to 2100 rpm..im learning to live with it however

 

Pypes long tube headers, h pipe, hf cats and flowmaster american thunder. No drone at all. Very aggressive at wot.