Not a bad recording Philly! You're right that the internal mic does a pretty good job - there are maybe one or two spots I can notice where I think a better mic would help, just certain notes you hit where it seems to distort or fall off in a strange way - this is probably due to resonance from the mic being housed inside the Surface rather than in a purpose-built acoustic chamber (being the body of most microphones).

The higher end Microsoft Surface machines have been very popular with Band-in-a-Box users, and it seems this is for good reason.

Let us know how the Antelope works for you - I don't think I've seen any BIAB users with one yet, so I'd be interested to find out!

I work here