Although I ride V-brakes now, I would not buy a new bike without discs. I've used Hayes hydraulic, Maguras and Avid Mechanicals. I really really like the Avids!

I think the bike industry is heading in the all-disc direction.
A friend who is a custom builder recently GAVE me his XTR/Mavic rim-brake wheelset. He said "Here, I have no use for these anymore..."