Anyone retube VTL 5.5 w/phono

Update: Received the pair of Cryo'ed CV4004's(12ax7) and first tried them in the phono stage (V1) and it seemed to me that the non-cryo Mullard pair has less noise...? Now have them in the line stage and they sound great!! Sounds to me that the V1 tubes on the phone stage made to biggest difference in the noise and the Mullard CV4004's worked great in the spot. Still want to try some teles in the 12at7 spots or any other suggestion out there? Thanks Jim
PS - does anyone have a manual that they can copy for me, please let me know and I will send some $$ for your time and trouble...Thanks!

I have no ownership experience with the 5.5, but I owned a 2.5 for several years. I found that the stock tubes in the line stage and phono stage were a bit on the noisy side. I also found that the Multicap upgrade quieted the preamp, but I believe the 5.5 ships with Multicaps.

I replace all of the line and phono stage tubes. Quality, tested Mullards, Tele's and Radiotechnique tubes were a huge improvement over the mostly Chinese stock tubes. As to which of the three I used, is a matter of system matching and personal taste. The Radiotechnique tubes were one of my fave's, but they are getting harder to find these days. Just be sure to purchase your replacement tubes from a trusted source.

As a side note, if you ever ship your preamp to VTL for service and/or upgrade be sure to remove the NOS tubes. They take issue with use of non-factory issue tubes, and bring warranty complications up as an issue.

Thanks for the reply. I have heard that same thing in the past as well regarding not having the stock tubes and VTL service. The 5.5 does have the Multicaps, but I will look for Radiotech tubes as well, had not thought of them before.
On a side note what amps are folks running with there VTL pre-amps. I have a Anthem Amp2 SE which is an hybrid but what to get into the mono block world...I think. Jim

The VTL MB-125 mono's are a nice match, of course, which I ran for over a year. I also owned the ST-150, which had a bit more slam than the mono's, but not quite as nice thru the midrange and highs. I chalk this up to the 125's using EL-34 output tubes vs. 6550 tubes for the ST-150. I also tried the Plinius SA-100 MkIII for a bit...very enjoyable with plenty of impact, but I still preferred the tube amps. Of course, you need to take into consideration what speakers you intend to drive. I found that ProAc 1.5's and Meadowlark Shearwater's were both great matches to the two VTL setups I mentioned (15x20x8 room).

I'm currently using a Cary SLI-80 with Grado's nice little PH-1 for phono stage. This comes very, very close to the quality of sound I previously had, with smaller outlay of funds. Can't wait 'til I start tuberollin' with the Cary.

Don't know if anyone is still following this old thread but here's my 2 cents.
In the line stage I tried a pair of NOS Bugle Boys as well as Telefunken 12AX7s both of which I liked better than the stock tubes but found it a bit edgy. Then I tried a pair of Mullard CV4004 which were selected for having close matched sections. I was informed that VTL selected the original tubes this way for minimum distortion. 
I found the CV4004 to have a nice balance bottom to top with just a touch of warmth  that helps smooth out digital recordings without giving up airiness. I also found them to have a great wide and deep sound stage.  
I tried another pair of CV4004s in the phono stage but found the combination a bit too lush for my combination. So I finally settled on a pair of NOS Telefunken in the phono stage. I use the MM setting with a high output Blackbird cartridge. The combination really works together in my system. Great high end extension, soundstage, etc. Sound very accurate to me and the Mullards in the line stage have that warmth to keep everything real.  The 12AT7s are all original, I believe VTL used NOS Sylvania for those. 
As far as noise I've had one tube in the line stage get noisy so I swapped the 2nd pair of Mullards in that I originally had for the phono stage and have had no other problems.