I have an old MTB (it was old 10 years ago). I went riding in Asheville last week on a comfort bike (Giant Sedona DX), and it was really comfortable. I'm in the market for a new bike, and was wondering if I can get a new MTB and get an adjustable stem and a suspension seat post to make it plush like the Giant Sedona DX felt. I have read that the comfort bikes have a little different frame, with the neck higher, but how much of a difference is it. I enjoy mountain biking with the guys, so I would like that capability also. I was looking at the Motobecane 600HT, or the Phantom trail, or the Giant Yukon.