OK, I have a couple, apart from some of the already excellent suggestions here-

1. How about Trifield capability for the reference stereo setup (i.e. 818). This is totally distinct from full-on multichannel for movie soundtracks, etc. and would be a card which would add a digital centre o/p and requisite processing. Trifield is basically a stereo enhancement (according to M's literature anyway?) and it would be interesting to hear a reference version through the 818, especially since Sooloos is currently still 2-ch. Reasons are that it feels like it's been a bit abandoned, but if taken to 818 standards might be amazing, and it's something fairly unique to Meridian as far as I'm aware. Also for 2-ch users, it might be good to have a centre, even if you don't want surrounds and subs filling the room.

2. I've said this before, but I would really love to see some kind of MRC for stereo listening, again (purely selfishly wink as a card for the 818, perhaps in conjunction with the above. The reason is simple - stereo, 2ch people have room problems with bass modes, etc. too!

James

HC: 861v4/ID40/LPS, DSP5000, DSP5000VC, DSP3100, SW1600, HD621, Oppo BDP-105, Sony VPL-HW55ES
2-Channel: Oppo BDP-105, TEAC VRDS-7/Trichord Clock 3/PSU, 551, Quad 303, Harbeth Compact 7ES-3, Kimber cables, Russ Andrews mains and supports.
Previous Meridian: 5000C, 5200SL, 7200.2, 6000, 562V.2, 568.2mm, 800v4, 808.2i, 818v2/v3, 861v8, 502