Sig Sauer are nice but I'd take a 10mm Glock over most anything else (and a Steyr AUG over anything else I've ever heard of). Forgot about Thailand for martial arts but after the ancient northern Indian priests 'invented' martial art the Chinese picked up the ball and ran with it...
I don't want to pay that much for ammo in 10mm <img src="/ubbthreads/images/graemlins/blush.gif" alt="" />.
My 226 is great, though a 210 would be better. Sphinxes are nothing to sneeze at either. The Sig 55x series rifles have got just about all of the other assault rifles beat in most categories, besides cost of manufacture.
As far as fighting styles, I'm a muay thai guy myself.