Check out YouTube for highlights of the most recent KSP wave contest at Hookipa. Robby Naish and Pete Cabrinha both ride backside.
They can both obviously rip front side( and better than you and 99% of us).
This guy has one of, if not THE best surf styles in all of kite surfing... and he does it backside! Check out his highlights from the most recent contest at hookipa too. Awesome, smooth, powerful, prefect timing in the right spot.
Your story sounds pretty familiar since the only 3 people I know personally, including myself, that have owned Switch kites have done the same thing that you mention seeing all your mates do at your local beach. I can't comment on the newer versions, but I had the first version Element. It was ok. T...
When I moved to maui in 1990, there was no one using that beach( except for a handful of homeless people who didn't mind the stench of the sewage treatment plant). In fact, locals called it Mahu Beach( and might still) because homosexuals could go there to do their thing and not worry about being no...
I'd take the 7 and 9. There might be some days where you wish you had your 13, but chances are you'll use your 7 much more.
Kiting in Kihei can be awesome, but it can be sketchy, and it's much less consistent than the north shore.