This was it: 21-23 knots before entering the water made me opt for the 10m, although my beloved R04 12m would have been the right choice, but couldn't wait any longer to test the new toy, so...
Wind: 15 (yes fifteen) to 23 knots on-shore (60 degrees)
Board: RRD XX 138x35 and F-One Style 130x39
Kite: Best Nemesis 10m
Water: rough sea with 0,5m to 1+m sets
When i ended setting up the wind dropped to around 18 knots. The kite is very, very steady, flies very fast and turns as a 10m does: on a dime. Felt at home in the minute i entered the water. This is the best effect one can expect: it means that the kite flies very, very well! Even when i had a missunderstanding with a wave, to my surprise it just went back to it's position with no sign of wanting to hit the water.
What impressed me most was that with such relatively low wind i had no problem staying upwind! Jumps where very good (can't wait to ride it lit up
Conclusion: Highly recomended!!! The Nemesis 10m is a very, very good kite. No problems found. Only goodies! So for a lower price, it owes nothing to the others on the market. There is a bad thing... THE PUMP! Someone has a size problem at Best...
I am surprised by the overlap in windrange with the R04 12m so i am curious about the top end.
About the boards: both very good! The XX 135x38 keeps impressing me. For today i felt that the Style is better as it is very, very good for wave riding. The XX is more free style oriented. If i had to choose one it would be the Style one size down (about 37 width or something like that).
Note: i never heard a bad feedback of a 10m kite
Final comment: So far (with only one session in the Nemesis and at different size) i still prefer R04. But for the price difference...