I run an MX Pro in 120mm on an Access XCL frame designed for an 80mm fork. On paper, that has some downsides. In use, it has worked fine on some very rocky, rooty, trails with tight switchbacks (think Sourdough near Brainard lake). Yes, running it at 120mm may put excess stress the frame wasn't designed for at the head tube but it handles just fine and I've used every mm of the travel.
Ideally, you'd match the frame to the fork but the OP just wants to try a suspension fork without spending a lot of money and the MX Pro is a great one at $271. If he likes it, he can always buy another frame to suit it. If not, he can turn it on ebay and get most of his money back. In the end, though, he hasn't spent a fortune on an 80mm race fork or wasted his money on a cheap fork.
Last edited by Proximo; 01-23-07 at 09:24 AM.