Both my FS mountain bikes have Fox shocks--like Jsig mentioned, the Fox RP2 is an awesome shock. I have an RP2 on my C-Dale Rize, and a Fox DHx 5.0 on the Yeti. These are both air shocks, and can be pumped-up quite firm. They do, however, top out at a certain point and too much weight can overwhelm them. The Fuel's typically use a 6.5" x1.5" shock--see if you can find something like that with a coil...