Hi, i've heard both 845 amps and think the Carissa sounds better. The Carissas or signature version amps are on Agon for really good prices. I have not heard them, but the Consonance 845 monos for $4k seem interetsting, the Mastersound compact 845 or monos(depending on budget) also look interesting. If $$ is an issue, the chinese make good 845 amps. I have an Audioromy 845 integrate that is excellent, especially for under $1K! Just some thoughts.
Enjoy, Alan
Enjoy, Alan