Picked up the new SE450 a couple weeks ago from Rinkers Boat World in Houston. Awesome experience once again with those guys.
The SE is definitely a beast. Coming from the SA last year you can feel the difference. Although I was worried initially that it may be slightly too big I quickly figured that. It to be the case. I love the extra space as does the wife. Slightly less freeboard than the SA it still holds its own in the cabin and you really can't tell in the cabin at all.
I couldn't be happier with the boat so far and the performance and fuel economy are almost dead on with what my SA was.
I will say I haven't had the chance to do much boarding behind the SE but so far because of the weather I give the edge to the SE on Surf and the SA on wake.