Anyone have a good recommendation for a SIP (VOIP) client that works for TP2?

[louisk]

So, I am looking for a good SIP client, that works with the earphone speaker as well as the speakerphone option, that actually gets a decent sound in both directions. While it would be good if it works against Skype, I don't care which SIP/VOIP service it works against, as long as I can sign up and get calling to Canada (from the US) as part of it. I have tried the Skype client (barf), and tried Fring (not quite as barf-y, but the earphone piece doesn't seem to work on TP2).

Anyone have any suggestions for ones to look at?
Thanks,
LouisK