Depending on budget, have a look at the VTL TL series of preamps. I have a TL-5.5 series 2 which has been in my system for about 8 years and have never regretted buying it ever. They drive a pair of Krell FPB 350Mcx amps which are connected in turn to a pair of Magicos S1. To me the system sounds amazing with all the definition, transparency, dynamics we all look for.
I used to have a Conrad Johnson Premier 17LS and an Aesthetix Calypso. They were good. The CJ was a little outdated and it did not have balanced inputs. The Aesthetix has a lot of features, but somehow the VTL sound appealed more to me.
Hope this helps but it unfortunately adds to your confusion!!!

