If the average joe feels too bulky at 36L and you want to ride the other thing at 30L, consider it in terms of percentages. If my poor arithmetic serves me correctly, that's approx. a 17% drop, which is pretty substantial. What sort of waves do you ride? How heavy are you? Are you a strong paddler? These are things you have to consider.
I second waikiki's opinion: that rocket is designed by a pro for good waves and is probably only fun if you surf at that level. There are far more forgiving boards out there. If you are set on CI's, the mini looks fun. The Superbrand fling looks really fast, forgiving, and they are way cheaper. Check it out:
http://www.superbranded.com/collections ... 6096763395Hope this post doesn't sound too didactic. Hope you find your magic board!