I'm 6'3" 240 w/ 13 boot and I ride the Flag 168. Best wide board I've ever ridden. Super quick edge to edge with tons of pop off the tail to help you get a little more out of your ollies and jumps. Very light tip tail weight which in theory should help with spins though you won't really catch me doing more than a 180 anyway I can't really say that it makes that much difference. It is definitely super fast and powerful through turns, stiff but not like just riding a piece of wood.
I looked at the Legacy also have not ridden it so I can't say from first hand but I just liked the feel of the Rome. I also liked their customer service response as they answered all my questions honestly and also offered to let me demo a board from their warehouse if I didn't end up buying one before I got up to Stowe. You won't go wrong with either brand though, NeverSummer makes a sick product and has a 3yr warranty to back it up.