I do have a USB out and I used it this way for ~2 years, but I got tired of the flimsy usb connection into the vaio, and getting bit by driver issues where the OS would just suddenly not recognize the mme. It wasn't common but happened enough to make me try other things.
I've been running mme -> vx pocket for about a year, but recently switched to some right angle adapters that don't fit the coax as well as the straight cable I was using. I figure as long as I need to buy a new adapter or cable that the AES will be more rugged.
Thanks for the feedback, cayman!