Originally posted by rawr Tamrac Aria 6 works. Maybe even one of the smaller models would do.
I have the Aria 6 and the 3 (and love them both), but I don't think the 3 will be big enough for the K-3 plus grip. One thing I like about these bags is that they're streamlined and look a bit like handbags (not girly handbags, though), so I will use in social settings where a more rugged bag would look out of place. Without a grip, the Aria 3 will fit my K-3 with either the 18-135 or 55-300 attached, a small wallet, a few accessories (like a rocket blower, memory card holder, etc) and possibly a small flash or smallish second lens.