Originally posted by Omestes
I actually just finished getting my 3 primes for both my camera systems, and I feel a very odd sense of accomplishment (which confuses my girlfriend to no end). On the Pentax I got the 15, 40, and 77, and on m43 I got a 12, a 25 (just came today!), and a 45, all of which are small enough to fit in a bag. With my camera bag I can actually fit the full m43 kit, and the two extra Pentax lenses in, without it being cumbersome.
Three primes is pretty much the way to go. Unless, of course, you're a zoom person (I'm not, nothing to do with perceived quality, for some reason I just don't enjoy them), and you're either lucky, or need 3 zooms.
I have a Lowe Pro compact camera case I bought for using a X100 I borrowed and it is a slip lock case so it fits on my belt and I got a small Lowe Pro case that can be used either as a shoulder bag or with its slip lock on the belt. I can then take my K5iis and three lense with me with the gear all on my belt. I am looking for something a little handier than the camera case, maybe a quick release holder for my belt but the beauty of Pentax is one can have such a compact sytstem with high quality.