Originally posted by Col Get a grip man.
Maybe, but I was hoping to save the cost.
I use a grip whenever I use external flash. My plan is to use the K20D with flash. I have the grip already, and I know the K20D has reliable flash performance. Flash makes up for the K20D's poor low light AF by adding AF Assist. For a wedding or event, I would use the gripped K20D with flash and zoom, and the K-3 with primes.
The other scenario where I sometimes use a grip is with the DA*300. Whether I get a grip for the K-3 mostly depends on how it balances with a long lens. I do like AA battery backup though, and it is a pull.