I agree with much of what Don just said, but I would also suggest checking out the Ace 5.1. That may be a better fit for your height, and, at your weight, would be a bit easier to throw down than the Big EZ.
At 6 ft, 32/33-in inseam, size 9.5 feet, it was a very tight squeeze for me to get into the 4.7 or EZ, so you might not have much better luck.
As for your weight, Wavesport publishes one very useful metric. They talk about the paddler weight at which the water line is at the boat's parting line (which is a line that divides the hull from the deck, as I understand it). Even thought the volume for the Big EZ and Ace 5.1 are similar (or the same?), that weight is about 170 lbs for the 5.1 and 190 lbs for the Big EZ. So, for you, that line would be out of the water for either boat, but more so in the Big EZ.
I looked into this quite a bit when I decided I was riding a bit low in my 5.1, with all of the associated difficulties (riding enders through rapids, doing inadvertent mystery moves at inopportune times, etc.). I decided to switch to the Big EZ, which, in my case, seemed to be a good decision.