Well, that Stixx rec did not come from me. The Ringer would be a good board for you if you are looking to advance your riding into 360s, tail slides, ollies and airs. It will just cruise along if that is what you want, but is more suited to carves and turns. As are all custom boards basically.
The custom board market is a performance oriented market.
You do not need a longer board or a bigger board. You will quickly outgrow it. At your weight and height they will have far too much volume.
Look at boards in the 4'8" range to as short as 4'4", depending on width and many factors, but mostly rocker (or curvature of the board).
Look online at Cal Marine Sports, and talk to Mitch. He is a great resource and can help you out a great deal.
Consider this custom 4'5" Ringer. It is perfect for you and Mitch will probably help you out on the price.