Pre-Pro/Preamp Room Eq - Help with Meridian

I have my music on a server in Flac. 90% of my listening will be in 2.2. I expect that I might dabble in SACD or other multi-channel format in the future. I was looking at the Integra DHC 80.2 (Audyssey xt32) or something like the Tact 2.2X. Both of these purchased used are within my budget. I had read that the built-in DACs in these units are good but not great.

I've been reading about other digital processors and the one that gets mentioned a lot for digital based two channel is the older Meridian processor (5.1) or the 861 V2-V4 (out of my price range). Always mentioned are the quality of the DACs in the Meridian. The Tri-Field also intrigues me.

So my questions are:
1. Would the older Meridians have better sound quality than the newer Integra or Tact.
2. Is there substantial difference in SQ between the 92/24 DACs (OA12) vs the 192/24 (OA13)
3. Does Meridian provide a set of response curves to select from for different types of music?
4. Would adding on an Audyssey SubEq or Antimode device to the Meridian V2 be the equivalent to the V4 with Meridian room eq.

Any other comments or suggestions would be appreciated.

Thanks
Gwho