I run OBX Headers, Flowmaster Cats and a Maximizer Exhaust. The system has no drone as you mentioned and the sound is in a lower register giving that “V8” sound which I luv. I’ve had Corsa in the past and really liked it, but does has a much higher tone. My 4 ZR-1 buddies locally all luv the sound as well.
BTW Maximizer and OBX are the same company, the only difference between the two is the finish. I figured that under the car nobody really sees the shiney stuff anyway so I went with the Maximizer.
H