04-29-09: Gallant_diva
I also have a high opinion on the VAC.
Besides the VTLs are rolled from the top
Do you believe the Tube Research are "rolled from the top" as well?
If I'm not mistaken, one of the pair of Tube Research that you tried (or bought) for your system were my old units. They were magic when over biased with EL34 Mullards but sucked with KT88 and 6550 (which were needed to reach any kind of reliability).
I really get irritate with people knocking the VTL 750 when several industry insiders and at least three reviewers consider them the industry standard for performance.