I have the xcelerator heater top and it has been great so far. Very pleased. I was thinking about picking up some additional gear from xcel for the family too.
They have a pretty good reputation in the surf community and they use neoprene that's as soft as butter. I would probably own them exclusively if Oneil's didn't fit me better.
I bought an Xcel spring suit for surfing like 5 years ago, I ride with it alot in the early spring and into the fall. It is still in super good shape and really comfortable. Highly recommended.
I have the xcel infinity 3/4 and I love it, it's as close to a dry suit as you can get, it take 3-4 good falls before any water starts to get in. Highly recommended