Hi Pubul57, yes the Carissa Signature is the best 845 i've heard, but i haven't heard too many different 845s. I've heard the Bel Canto i40,and it was very good, but it's been a long time since hearing it, same with the deHavillands. If you are buying new, you should be able to demo one in your system, that would be best.
Regards, Alan
Regards, Alan

