Just like you i am also a wave addict. Have been riding 4 and 6m Nanos for the past year. Use to ride F-One Tribals II and Slingshot fuels in the past so I feel we kind of have the same background.
All this to say that you have to try the Eclipse Thruster 8 or 10 m with short lines (20m) over the Nano 9m.
I am light (65kg) and only ride surfboards so my "perfect" quiver right now is Nano 4/6m and Thruster 8m all on short lines.
If you can be patient, Eclipse will be releasing for 2009 a dedicated wave kite called KIMA (wave in Greek) which main characteristics are , 3 strut construction, ultra fast turning and relaunch, bombproof construction, Sizes : 4/6/9/12
I tried the 10m Thruster and the 9m Nano on short lines and for me the 9m Nano is the go.
I was riding waves in 10>>15 knts on the 9m Nano and couldn't fault it.
The 10m thruster for me had no where near the bottom end of the 9m Nano .
I was amazed at what I could do in those light conditions and never had any issues with catching up with the kite. For me the 10m Thruster is way to light on the bar and turns in a wider arc than the 9m Nano so the Nano is the one that suits me.
Interesting cos I understand a lot of people prefer the Thruster over the Nano in the 9m size so it goes to show the need to try out kites before buying them to see what suits our different styles .
The 9m Nano was awesome in light winds and got me going upwind and more importantly down wind on the waves, and in those same conditions the 10 Thruster didn't work the same for me.
So to all you serious wave riders , give these kites a fly if you can and see what you make of them yourself.