Well from what I have learned is that I am looking at a XC style bike probably. I don't think any of the others really suit me except all mountain but I don't like the weight and haven't ever ridden a chair lift to do some biking. So with that in mind I think that a 100mm travel fork should be good but maybe 29ers come with more travel? I think my bike now has 80mm of travel and the extra 20mm will be welcomed. So basically once I get a 29er HT frame and then down the line I would want to look for a FS that has the same BB and Head tube size so that the bearings and cranks are compatible? That is the only portion of bikes I have yet to take apart is the crank and fork. So I am looking forward to this learning experience.