Hehe! Yeah, it's a tough choice - feeding the kids or buying the Parker.
But seriously, I've seen them sell for around $1000 on Ebay, which is a quite a discount from new. However, if you're into recording new age instrumentals (I am too!), I'd suggest going with the LGX-SA and a Roland VG-88 or GR-33... or Both. I paid just over $1000 for my LGX-SA new, and it interfaces really well with the VG-88. Since I got into synth guitar, it has opened up a whole new realm of possibilities for me. I love experimenting with the different sounds, and "building new guitars" with the VG-88. All in all, you could pick up a new GR-33 and the LGX-SA for less than you'd spend on the Fly alone.
I've never tried the MIDI Fly... I'll bet that's a lot of fun.
J.R.