some info to peruse.
If you are adament about pocket carry the LCR is probably the best choice based on size only. I don't care for double actions so it wouldn't be my choice.
I would opt for the LC9 and get a good IWB holster ala MTAC:
I carry a slightly larger 9mm doublestack in a IWB holster and it took me about thirty minutes to get used to it.