ARC ref 5SE question

Hi I have an option of buying a preowned ref5SE. My amps are the Audionet MAX and my natural choice would be the Audionet top of the line pre but I don't have where to audition. My current pre is the MBL based MC601 by music culture technologies. I never thought I will go for a tube pre again but I can audition the ref5 probably next week so I will give it a shot. What should I expect from the ref5 Se? Previous owners – which pre replaced it and why? Did anyone compare it to Audionet pre G2 by any chance ? Thanks in advance to all repliers.