I've not ordered one yet, but I'll soon be going for a Hawk exhaust.

http://www.pipewerx.com/pipewerx_bik...awk-sl-gp.html

They're actually Pipewerx, who have a good reputation. Apparently, the Hawk cans are the same as the Pipewerx cans but without laser cut and hand assembled end doodahs. The quality and warranty is the same.

The thing that swung it for me, after talking to them, is that they said they can sell single cans not just a pair, plus they will do repairs. For a noob planning to take my XTR off road, a supplier who will sell single cans and repair dings is a big plus for me.