if u wanna spend money on something will be really awesome, get powerisers(powerrizers, powerskips, etc) they are awesome. we were gonna get some last summer, then didnt. probably next summer. they are amazing. just make sure u get the right ones for ur weight. u can find them for like 250-300 bucks.
here are some vids.
http://www.youtube.com/watch?v=GVTLHsuoBls
http://www.youtube.com/watch?v=RrH_c5oKk9k