Hi Ski guy,
Yes, I own and have been skiing on Dynastar Speed 63 for about five years. It's one of the best all mountain skiis available. I'm sure the newer models are better as I also have a pair of Speed (Course) 66's. As I live in New Hampshire, one of your old colonies, we have alot of hard packed conditions here and we rarely get ideal powder here in the north-east. I have found the skiis track very nicely without being pushed around from ungroomed conditions, are excellent at the higher speeds as well. Very stable and predictable. I ski 170's and the 178 on my Speed 66's. both ski's are for advanced to expert skier's and I would recommened them to this type of skier. and a side note, I have skied on most of the brands of ski's and keep coming back to the Dynastars. I weight 200 lbs and am 6-3' tall.
P.S. I was born in Romford, Essex, and still have family over there in Hampshire and Devon. Cheers for now and good luck with your skiing.