Advice on getting my second board

Hey guys, I'm currently surfing an 8'8" Andy Jacks Power Point. I can stand on it comfortably and i can sort of control it a bit. I've moved on and started catching greener steeper waves as well (which has led to my pearling quite often). I'm 5'11" and 185 lbs. I was thinking of getting an 8'1" Mctavish carver as it has more rocker, paddles close to my current board, but is easier to turn. Is that too small a progression for me? The guy at the surf shop thinks I should get a 7'6" shane stingray but in when i looked at the profile of the board on their website it said the board was for intermediate surfers and i'm clearly a beginner. Advice would be appreciated. Thanks. 
