Second time buying trampoline. what brand/type?

OK our family is buying another trampoline...for 'exercise' and we don't know what kind to get. Right now, I think we have an 8 foot jump king, with three children on it mostly, one child at 200 lbs, one at 60, one at 80. It works fine, but rarely the oldest hits the ground, and we need a large trampoline mainly for tricks, and jump height. It needs to be elevated higher above ground than most, and must be able to handle the children's weight. Net would be nice too. abd it needs to be something you can find in a store. no online shopping please.