I've used the Gyokucho 300mm ryoba saws a bunch and they're pretty good.

But I've recently become a big fan of the Z saws that have 330mm separate crosscut and rip blades. I get them from:
http://www.tashirohardware.com/
and they're super friendly and have super sharp saws. They cut a good bit faster than the 300mm Gyokucho, but smooth enough for timber framing.
Brad