Lexicon MC-1/EAD TM 8 Signature/Anthem AVM20?

I can't decide between these three. I listen to music about 50% of the time so a good 2-channel performance is very important to me.
All three cost about the same now (MC-1 and TM8 used). I know Lexicon is the biggest name here but I am a little worried about it's age and future support.
Would love THX EX and DTS ES but this is not a deal breaker.
I currently have a pair of Krell-250As, McIntosh MAC-3 and Sonus Faber speakers.
Please help!