I'm just getting in to the sport, and need some advice. I'm a large rider 250lbs 6'5". I'm wondering if a steel frame will be more durable for someone my size. I'm looking at hardtails, like the Jamis Dakota xc, Bianchi Grizzly etc. Also, I plan on riding xc. Can anyone reccomend a good heavy duty xc bike that will take some abuse? I've heard some good things about Kona. Thanks.