Hey Blownaway,
I retail all the kites you mention.
And personally own a Matrix 13.5m 06.
between the Waroo and Sonic it will pretty much come down to how you like the look of the kites, personally.
The Matrix is a standout kite in build quality and performance and tune-ability.
I was out on my 13.5m yesterday and surviving high 30's squalls. so don't worry about depower issues. As for performance, you need to think about what you really want your kite to do, and try them yourself. It will be down to your own personal style that determines things like Boost, Hang time, unhooked Wave riding etc.
so to answer your ?'s
Happy Campers = yes

Surf = YES

best winds
Tony L