most newer kites '06 onwards are made well and will last a long time.
you need to decide what type of kite you will buy.
C kite - traditional, nowdays have more depower than they used to but still have that "power always there feel" - would probably need 2-4 kites depending on your location and conditions
Bow/hybrid kite - tend to be most popular(not necessarily better) as they have huge wind range and depower and you could get away with one
9-13m kite depending on the regular conditions.
Mattress/doona(

) kite - they get a bit of a bashing, but appear to be having more of resurgence and again are very safe and have huge wind range(especially light winds) NOTE: you will regularly have your sexual orientation questioned so you might need to get a thicker skin or ignore people.
Go to your local spots where you plan to kite and watch what the other guys use. Ask around, maybe some of them have gear they want sold and remember your first set of gear will probably get bashed to f*ck while you learn so sometimes cheaper used gear is a better idea.