I am 6'2" and 180 pounds. Inseam is 34 inches. My arms are probably a little short for my height. I have a large Ripley and just sold my large Tracer T275C.
Today I rode an XL and a L DH3. In order to get the cockpit's close, we put a 30 stem on the XL and a 70 on the L. There were also 3 spacers on the L and 1 on the XL. (This was actually reversed from the original setup on the demo bikes. I tried them in the LBS parking lot and I felt like Homer Simpson on the clown bike on the L and like I was on a giant toboggan on the XL until we made the switch.)
Fortunately, the rain stayed away I was able to ride Aliso and some of the Whiting trails in Orange County, CA.
I changed my order to an XL after the rides today. They were actually very close, but I felt I had a little more room in the cockpit of the XL without being overly stretched out. The L was just a little cramped. I ran the KS 150 about an inch above the collar on the XL and over 2 inches on the L.
The good news was that neither size put me in the weeds and the longer wheelbase felt a little more stable on the dh without sacrificing playfulness.
Overall, the HD3 is similar to the Tracer but climbs a little better and is a little more flickable. I am sure this is the DW vs. the VPP suspension.
This was also the first time I was able to run the 741 rims and they were awesome! Great traction in some of the "loose over hard" terrain we have in SoCal.
The bikes were both a lot of fun.