Just looked at the UltraCurve... Here's what I'd change:

20 - 20 kHz -> 10 - 22 kHz freq response
24 bit/48 kHz -> 24/192

I'd ditch the graphic eq, and add 2 more filters for the parametric eq (5 per channel).

I'd also add a subsonic filter.

Put 4 of them in a box (8 channels), and sell it for less than say $1g. I like the RTA with the included microphone!

There's no time delay in there, but I'd rather have my pre/pro doing that...