Hi Tim!
Welcome

It's a pretty frequent question and one that is understandably daunting to a first time buyer (as it was for me as well).
It's also a fairly difficult question to answer conclusively as alot of it comes down to personal preference/ability/style/budget and a whole bunch of other Tim-related factors.
To give you a start, check out "How to choose your kitesurfing gear" and "buying second hand kites" under the News tab, articles, kitesurfing on this very fabulous site.
Other great resources will usually include your instructor, chat to as many people (both at your local kitesurfing beach and shops) as possible. This can be confusing because there's heaps of different opinions, but sometimes you can get a feel for what emerges as a common theme.
Figure out if you would like to buy new or second hand (second hand is usually cheaper but there can be the odd trap or two). Perhaps choose a budget and see what you can get for that money?? There are cheaper new kites than the one you found, many of which various people will have differing opinions about, but may serve you extremely well.
Might also pay to do a quick search (top right of the screen) and see what pops up, can be heaps to trawl through but loads of info already laid out in quite a few posts.
I know this didn't really answer your question too decisively, but hope it gives you a start.
Cheers :)