I'm using CollaborateMD. $149-$199/month. That includes McKesson's clearinghouse. Easy software, good support. Able to check Eligibilty, electronic claims (of course), have real time adjudication, electronic remittance, they'll do your patient statements if you want for something like 63 cents a piece. It also has more reports available than should be humanly possible. Nice code viewer where you can review the CCI edits
They are in the process of getting my interface. It goes through X-link and should be ready in a week or two but right now we're double entering everything which is not near the pain that I though it would be.
I like it so far. Well worth the money.