I had the 08 10.5 and 7.5 both of which were super good kites. The 09 is a little better in everything IMO, but the 08 is still a super nice kite.
So to me that would just be a matter of if you can afford it. The Cults are reasonably priced, and the 09 comes in two versions, one with the octopus system and one without that is even more reasonably priced.
The 09 9 meter is really nice and smooth and can handle a tonn of wind, also the new bar is improved upon...but as I said either one is really nice..it is a matter.
Just note that just because I like a new kite and say it is better, doesn't make the other kite bad in any way, of course flaws often surface when you compare it with something better...but I mean I still think the Boxer SLE was a nice kite, but I do like the Sigmas quite a lot more...and for the use you are describing I'd say the Cult is just about perfect.