Value of a preamp?

My experience over many years of making component comparisons (for a living) is that you can live with more amplifiers than preamps.  That's how important the preamp is.  It's the brain and intelligence of the system.  A preamp can make or break an audio system.  And, having said that, using a great preamp as opposed to bypassing a preamp (with passive volume controls or DAC based volume controls) simply gives better performance. Perhaps it's due to impedance matching or other such electrical conditions, but the preamp is vitally important.  The sound is more liquid and has more vitality with a great preamp.  This reality has born itself out time and time again over the years.  Don't shortchange your system with a poorly performing preamp (or lack of preamp).  I have discovered some great preamps out there and I'm happy to recommend them should anyone be interested.

I have also experienced the beauty of synergy between a preamp and amp. More often than not, the same brand of preamp and amp gives the best performance. But there can be exceptions.

My favorite preamps as of late are as follows:

Mola Mola Makua - $12,200 as a line stage. Phono card adds $3,000 and DAC card adds $8,500. Transparent, neutral, and dynamic!

Audionet Pre G2 - $23,350. Great body, transparency, dynamics, and 3-D.

Audionet Stern - $48,950.  The most transparent preamp I've ever heard. But it also has the most accurate tonality, best bass and bring things to life dynamically in stunning fashion. 

I've only heard the Aries Cerat in passing in an unfamiliar system (which didn't impress), but not in a comparative sense.  Every system I've heard with an Audionet preamp (and amps) is always great. And admittedly they were carefully curated systems.