Best Sounding Passive Preamp


What is the best sounding inexpensive passive preamp? I may have to send my preamp in for repair which could take a while and I don't want to be without music. My top priority is sound, but I don't want to spent a lot of money as I will be putting my preamp back in system upon return. Help please.
slowhand
I own a Promitheus TVC. I have had it in and out of my system (depending which amplifier I am running) for 3 years. It worked flawlessly when I used it with my Monarchy SM70's and Nola Boxer 2's.  I have even ran it using 25' rca's. No issues whatsoever. I very recently purchased an Aric Audio Unlimited pre to use when I pair my low gain First Watt F5 with the Nola's. I find to my ears,the Promitheus to be very true to my sources. YMMV.
@zvovchik ,I have been using my Promitheus Reference C-Core TVC since 2009. Search these threads and there are a lot of postings by forum members.