I realize all manufacturers warranty their frames, but which is the easiest to deal with if there is a problem (cracked weld joint) whatever. I've been riding the same lugged steel bike for the past 20 years finally the bottom bracket stripped out, so going to go the aluminum route. So basically my question is who honors their warranties no questions asked, I weigh 230 pounds so I'm going to put some stress on the frame. Leaning towards a giant mtb.