Not sure where dolphinkite is at ? but I have to strongly disagree with dachopper UNLESS you are past the first kite stage.
IMO you will advance through all the initial frustrating stages much faster on the fattest, low aspect kite you can get your hands on. The performance advantages of an advanced kite will not only be useless to you until you are able to use them competently but will actually work against you when all you need is time up on your board. Low aspect offers stability, steadier responsiveness, easier relaunch etc etc all of which will give you more time up & practicing rather than down & swimming & walking. You will shorten and enjoy the learning curve more and there will always be a new newbie out there well served & grateful to take your 1st kite off your hands when your ready to move on - sooner

Dachoppers advice is probably spot on from then on
Thats what I reckon anyway

"He who enjoys most - WINS"