I am looking to get a DS bike. Considering these two. What are the advantages as you see them. It appears from the mfg. spex that the XR is about 30 pounds more. What do they weigh after moding them to remove the normal junk? The XR is very tall ... I'm 6'0 so it's not a huge issue. What are the respective power outputs? Does the 250 extra cc get you more grunt? Better for wheelies? How about reliability. XR's seem to have a good track record. Air cooled seems to work ok, even in the hot desert (where I'll ride). How does the DR do. Thanks in advance.