James,
...talking about prototypes - in another thread i asked you about a Bryston device that could do state-of-the-art stereo recordings. maybe this could be the next prototype (in the near future) ?!
now that you have perfect playback units and you're planning storage devices (server) the next step could be a recording device. the computer can do the job but a more dedicated gear would just be great ?!?
al.
The whole shebang:

* Stereo solid-state audio recorder
* Records to Compact Flash media
* Up to 96kHz/24-bit Broadcast WAV file recording
* BWF file format with iXML metadata
* Multi-channel flash start
* Dual CF card slots for mirroring or continuous recording
* Color TFT touch panel interface
* 5-second pre-record buffer
* Cascade function for multiple unit operation
Physical specifications:
* XLR balanced analog inputs
* XLR balanced analog outputs
* RCA unbalanced input and output
* S/PDIF digital I/O on RCA connectors
* Word clock BNC input
* PS/2 keyboard input
* Parallel control port
* RJ-45 LAN control (10/100/1000) on locking connector
* RC-HS20PD Remote input
* USB 2.0 host connector for transfer to flash memory drive
* 1/4" stereo headphone output
Optional SY-2 synchronization accessory adds:
* SMPTE timecode input
* RS-422 serial control
For your particular application (recording LPs), this one will do a perfect job just for CAD $800:

Features:
* 8-track portable recording
* Record eight individual inputs or six inputs plus a stereo mixdown
* Up to 96kHz/24-bit Broadcast WAV file resolution for 8 channels
* Stereo 192kHz/24-bit recording mode
* 4-channel MP3 recording
* Digital monitor mixing (level and pan) with recordable stereo mixdown
* Mid-side microphone decoding, either during recording or monitor/mixdown
* Ganged input option for use with stereo microphones
* Ideal for surround music and effects recording
* Cascade function for running two units together
* Pre-recording feature
* Auto-recording mode begins recording when the input reaches a certain level
* Mark function during recording/playback
* Edit functions such as divide and delete
* 128x64 backlit LCD display
* Powered through (8x) AA batteries or (included) PS-1225L adapter
* Records to SD/SDHC card media (not included)
* Premium AKM Audio4Pro™ 192kHz A/D converters with over 100dB signal to noise ratio
Physical specifications:
* (6) mic pres with 60dB of gain and phantom power
* (4) XLR/1/4" (combi) mic/line inputs and (2) TRS 1/4" mic/line inputs
* Low cut filter and limiter on each input
* (6) RCA unbalanced line outputs
* S/PDIF digital in and out
* USB 2.0 (mini B) connection for computer
* Built-in speaker
* 1/4" stereo headphone output
* Included accessories: PS-1225L power supply, shoulder strap
* Dimensions: 7.95" W x 2.12" H x 6.93" D (202mm x 54mm x 176mm)
* Weight 2.65 lbs (1.2kg) without batteries
If you're wondering about the ADC/DAC, it uses professional 32 bit stuff:
http://www.akm.com/press-releases.asp?prid=10Short video review here:
http://vimeo.com/12497497and as Steve mentions, the next step up would be an order of magnitude more expensive (dunno what he had in mind but I guess that in the portable category it would be the sound devices SD788t)
Say James, there's quite some competition to the BDP-BDA combo???
Nap.

P.S. Just for LP recording you can get away with the thing on the right side, it has Line input:
