Two options would make me happy. One option would be someone who would support me in case of an audit and who would answer questions on a time and materials basis. Under this model I'd do my own taxes and ask one-two questions a year, but they would help me put together a response to an audit if it happened.
The other model would be someone who would actually save me time by doing my taxes well enough that I actually saved time. I'd expect them to take a few reports from Painless Security's accounting system (I don't use Quickbooks), all my 1099s and any other paper forms that they need and produce taxes. They would also be available to answer accounting questions on a time and materials basis. They would need to deal well with the fact that I'm probablying using accounting software they have never heard of, although I can give them the data they nede as a CSV file.