I would have to agree with jaxx, get the datalogit. Tuning with the controller is a big pain in the butt but possible. The datalogit has many other features that the controller cannot access so the tune will both be much better. Its worth postponing your tune in order to do it right then to pay more money for a tune you might not be happy with.
I have an powerfc and a apexi bcs on the way, datalogit has just been ordered.
You can't really go wrong.