In reply to arch the parch:
I can vouch that Rob Jarvis at High Mountain Guides is a good guy...good chat and enjoyable to be out in the mountains with. I've previously been on skiing courses run by him.
I've also heard first hand that Johnny Baird is good, but have no direct experience with him.
I also suspect that any of the Guides qualified through BMG will be pretty good...
Regards
Calski