ARC REF 3 or MBL 5011 - what is better buy?


Hello, I have the opportunity to buy MBL 5011 and ARC REF 3 for a great price. I cannot demo or audition them so I would like to get the opinion of the people who have/had/tried them in their systems. My listening preferences are jazz, classical (orchestra, chamber or solo piano) music. The rest o my system:

Esoteric x-3se cdp
Plinius sb301 amp
Egglestone Andra II speakers
Stealth Metacarbon Ics (RCA)
Stealth Dream Petite (bi-wired) speaker cables

Any advice is highly appreciated. Please do not bother with recommendations to demo/audition them because it is out of the possibility.
denon1
contact Tboooe. he had both preamps. I am sure he wouldn't mind sharing his thoughts. REF3 is a good preamp and I think if you are listening to a lot of large scale orchstral it may serve you well. Tboooe kept MBL. But I believe his taste in music is small ansamble jazz and vocals and not a lot of large scale classical. But do contact him. Also read through his system page he shares his thoughts there in regards to both units.

Best of luck!
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Just to clarify,I owned a REF 3 and a Capri which I acquired based on Guido's favourable reviews,he is a well respected audiophile.The Capri just didn't make majic in my system,nor those of several others I have since corresponded with.
I am a believer in equipment synergy and I have no doubt that in Guido's system the Capri excelled.
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Tvad, I agree. I will have to go this road again. Trial and error. Untill I hear it in my system and in my rooom, I will not be able to determine. But still your advise as well as the others is very helpfull. Thank you.