Since they are all pretty similar,I would take out the attack banana because it is more park oriented, and the T.rice because it will be stiffer than your custom. I would also take out the proto since you hate the graphics.
You are now left with the sl or trs, both about the same flex as your custom. I had more fun on the TRS but that is just me.
If you want an easy way to decide; if you ride in more icy areas then get the trs, if not you can get the Sl.