Sid3ways S13
20+ Year Stangneter 

SLP LMII (the new one that came out) is a great exhaust (paired up with UPR X-Pipe). Does its job under heavy accel. but driving at 2k rpms cruising is almost hard to detect you even have an exhaust. Very close to stock sounding in 5th gear at 60.

I'm going to stick with the Stinger's for a while and see how it all settles out, because it's not that loud.