opinion
I have had my wilderness rx for close to 9 months and put hundreds of river miles on it and more than a few hours on flat water.
It can and does just fine with 300 lbs. To me it is more stable than the vous - it is just about the most stable solo I have been in (when the seat is in the lowest position). They both are fairly deep and will catch wind. Both turn fine, not hard to keep straight, the vous might get the edge in speed, but not by a lot.
Also I have taken mine on small bony, up to class II, all the time and remained dry.
Here is the river I paddle most of the time.
http://i197.photobucket.com/albums/aa7/cbia/P1030253.jpg
