Ok, when i first bought my mx-6, I had to get an exhaust and I wanted a REMUS, I had searched around the internet for certain places and at NOPI they had it, autobahn international, Claus Eittenger(whatever the hell the name is), and guess what? THEY F*&KIN' EXPENSIVE for just a muffler. They sound nice but they are just too expensive expect to pay 500 dollars for a muffler with beautiful chrome tips. Sebring on the other hand doesn't make an exhaust for our car, only a universal exhaust. Honestly, I wouldn't spend 500 dollars for a muffler anyhow it isn't stainless. I would love a REMUS myself but you have to think about the Benjamin's too.
but if you are willing to spend that money, go to nopi, check for autobahn international (they deal directly with Remus and supersprint). I remember knowing of a place that had it for like 450 and that was the cheapest.
p.s.
i think in europe you can find it cheaper because they are more common around there...I would also think of a supersprint universal exhaust to be a nice piece on an Mx-6