If you want the new preamp to be part of your home theater system and integrate with your Meridian, you might want to consider a Conrad Johnson Premier 17LS which has a home theater bypass feature. I have used mine in a combined home theater/2-channel setup and it has been great.
Ayre KX-R or Krell 202 with Martin Logans
Looking at adding 1 of these 2 preamps with my ML's. If anyone has any other suggestions please let me know. thanks