Chaps thanks. VirusKiller, it's not that one. Have been following that thread. Personally, and this is just me, I tend to shy away from the very low serial numbers in any product if I can. I'd rather the manufacturing team got a bit of practise, learn from any mistakes and implement any tweeks before they make the one I'll buy

Naturally, they should do this before production begins, but hey ho, you just never know.
http://cgi.eBay.co.uk/ws/eBayISAPI.dll?ViewItem&item=120501026138&ssPageName=STRK:MEWAX:IT
This is the one on sale.
I take it that the mm can take the HD621's output direct and the 568.2 would need to be fed from an Oppo with the 4xcoax mod? Is this correct? Though the inputs are sufficient in number, can the .2 be configured to run this way? Or is the modded Oppo designed to be connected directly to DSP speakers in twos? If so, then naturally, the mm is far more versatile allowing many devices to be connected via HD621.