I'm just about the same size and have used a Burton Canyon 168 for the last several years. That was a decent board and work well for us big footed people. Not sure if they make it anymore but you can probably find something similar. Now I'm looking at Never Summer Legacy 166. This is like the Burton in that it is a little wider than some other boards.
I'm 6'6" 240 with a 13 boot and I ride an Atomic Hatchet for my park riding. I had a Canyon before, mainly because of the wide waist, but wanted to switch to something a little easier to maneuver. I think the K2 WWW has a slightly higher than average waist size if you're worried about toe hang.