We bought the 2450 with the full sized (60 X 80) Queen corner bed. it is a Serta pillow top and is very comfortable.
We looked at a new 2250 LE, but that bed was horrible. Where it broke was a hump and your head and feet are down and your middle is bowed up. Very uncomfortable. Even if you put a memory foam on top it still would have the hump in the middle. I really liked the rest of it but that was a deal breaker. Make sure you go see one and try it out. Good luck in your search.... Love the Sunseekers!