It's funny you should ask, I just left a 5 hour focus group and we have decided to build a new ski for next year...it's going to be 218cm long, 49mm underfoot and built with a lot of metal so it doesn't bend very well...
by they way, how do surface skis compare weight-wise to other skis. i like big light skis, i ride 187 msps and they are light for the size. straight up lighter than thalls.