You can run those 6 paddle extremes on there. I've seen a number of people on here over paddling there Banshee's. I do know that most Banshee's can handle 8 paddles, but with that many, you are going to lose some on the top. Try out the 6's... It can't hurt. It might spin a little off the line, but you will gain big on Dumont's Comp Hill. That hill is really long, so the less paddles you have, the more speed you will get on top.
Just my .02