New to MTBR and am looking for a new moutain bike in the $400-$500 range. Was unaware of Ibex until I started reading forums here. The Ibex recommendations are very high from MTBR forum members. The Ibex Alpine 550 looks great for the money. How can you buy a bike like this is you haven't even been able to ride it a little bit to see if you like the riding position/posture and feel of the bike? Also, if you're going to buy mail order like this, how do you know the size frame to buy? I am 5' 7", weigh 150, and buy pants with a 30" inseam measurement. Would that indicate a 15" or 17" frame? Thanks for the advice.