I switched to RTCOMM for some time but I have now switched back to pidgin. There are two features on pidgin that are missing in RTCOMM and that bugged me enough to switch back. Pidgin shows me when the other person is typing, RTCOMM does not (If it does, I have not found a way to enable it). Pidgin shows a little cellphone icon next to contacts when they log in over cellphone, RTCOMM does not. I tend to use both of these features quite a bit.