I'm 6'3", 215 without gear, and paddled the 2007 4 fun all season and loved it. I'm not sure why you would want a bigger boat honestly--at my size, I still paddled the big water (Numbers at 3000+, Browns at 3600 or so) and it was great. I didn't find ferrying to be an issue--just center your weight back a hair when on your edge and your bow doesn't pearl (I also have the seat almost all the way forward in the boat).
Plus, the 4 fun plays very well for my size--could loop huge, cartwheel, etc. no problems, although it of course has a little more "sluggish" feel in the hole compared to my superstar.
A great all around boat for someone my size--fantastic downriver and play.