yes, it does not really matter, just get a boat. I tried out tons of boats before purchasing and I have to say, that no matter what boat I finally ended up with, I would learn how to control that specific boat.
However, I am large too (6'6" 210) and I needed to try many boats to find one that fit best. I ended up with the Dagger Gride6.5. Its more of a river runner but has plenty of play potential especially for guys over 200lbs.
I also really liked the T4 but found it to be huge and heavy. However, it is more balanced end to end than the Gride. You might want to try and squeeze into a T3. I have not sat in one but I loved everything about the T4 except its huge size, so I'm sure the same design with less bulk would be exceptional.
Pretty much every boat has a planning hull. There is no such thing as a playboat with a displacement hull. (That I know of) That is probably why you are having a hard time finding information on the hull types. They are all planing. The type of hull only becomes a point of discussion when buying creek boats or old boats.
The SuperEZ seems to be the most popular boat in the world. But thats partially because it is an older design and has more time to build a solid rep. Everyone has a friend who loves his/her EZ, so its not hard to decide to buy an EZ. However, it is an older design. It was designed when playboating was about cartwheels rather than aerial moves. Playboats changed a lot for the 2003 season with designs like the Transformer and the Riot Air. Now, your probably not going to be able to do aerial moves for some time, so thats not really a concern. But you might want to get a newer design just so the aerials are at least a possibilty.
just my thoughts...