I've got a Big EZ too (I'm around 6' with a size 12.5 foot). Although I also initially had issues with the foot cups, I've found that if you get some relatively flexible booties and adjust the foot cups to the right length, it can actually become pretty comfortable. My main problem was that the booties would crease in the middle when I stuck my feet in, and it would be really painful (it took me a while to figure out that it was the booties instead of the boat). I haven't tried the Jackson Happy Feet, but I've heard that they're pretty comfortable. I would probably avoid getting the Super EZ unless you don't want to play much, since it has so much more volume than the Big EZ.