They are not so good, they seem to bend really easily, the hubs are amazing, but for the same money I would do a custom wheel build on chainreaction with hope pro 2 (choice of color) and like an 09 sun mtx 29 or mtx 31 or the new mavic rims, I know people will dissagree but I would stay away from the dt.swiss.
Just personal oppinion, Im heavie than you too lol but i know tiny and huge guys who have all bent the dt swiss from doing nothing but xc or trail riding.
Doubletracks are too heavy but for 09, as I mentioned there is 4 widths on mtx, 29 mill, 31 mill, 33(1 mill off old standard mtx) and 39 (doubletrack width) built properly you could use a 29 0r 31 mill depending on the tire width you choose, chainreaction have always built stiff strong wheels in my experiance. ( 2 wheel sets and 2 single wheels bought.)
tThe larson seems to rol fairly slow in my experiance too, Intense micro knobby ftw, grippier than it ppears, or 2.35 high rollers for wetter, looser courses!