As soon you understand how speed is important you will start boosting skyward higher which is #1 key factor for higher jumping.
#2 key factor is the upward component of the force which is only a transient force by itself and often absorbed by the lines and not enough for boosting "high".
In combination the faster you move forward, the more you can send the kite upward (you donÃ¢â‚¬â„¢t need as much backward force) to jump higher.
So why depend only on the low end grunt transient forces? From my observation I see all the time a rider can jump higher all the time with more control with a smaller faster kite while they are sining the kite. So don't be afraid!
Here is my 2 cents before you decide:
#1. Please try out different kites which one you like best.
#2. Read the recent UK Kitesurf Magazine Mar/Apr 10 high aspect around 15m Kites. Note: after you read it you will see the rhino 16 is only for people whoo are over 200lbs and "beware of it it may spank you".
#3. You would not be disappointed with flying other kites like the Gaastra GXR 16.5m and Takoon Scoop 17m either, I'v flown these and they are amazing . So give a chance for yourself to decide, but only after you have flown theese kites and than you will the real thing. Since you are on the lighter side you don't need a biger than 17m kite, otherwise your range will be limited & narrow easily overpowered pluss you have to be a heavier rider to make a biger kite faster.
I just tried to help and hopefully it's useful.