Basically, what I'd be looking at is something that can tie one set of mics in and a SBD. Optimally, I'd have a second set of mics feeding in as well. I would need phantom power for the first mic pair. I definitely want to take everything to a hard drive recorder (currently using a lappy); and synch'ing on the front end would save headaches in post work. And adding to the mix is that whatever I use has to be airline portable, i.e., fit in the overhead storage or under the seat in front of me.
I'm playing around with a FW 1814 right now; but (as posted elsewhere) I'm having ASIO driver issues. I've had the opportunity to 'fondle' the more expensive MOTU gear and I really like the equipment. So seeing that they may be trying to cater to this (less expensive) niche is nice. Plus, according to the literature, it can be battery powered.