I'm looking to buy an electronic drum set for my son for his birthday and am hoping to get an opinion on two sets. Being a guitar player I'm not sure what to look for and what's important in my price range. I'm looking at a roland td-11k and a yamaha dtx522k. Both are $999 and seem to have similar features. Both seem to get good reviews. What do you drummers think? Is there another brand I should be looking at in this price range? Thanks!