I have the VTL 6.5 III for the tubes and the high number of inputs including two tape monitors. The stock tubes were SHOUTY. I have not tried the Amperex, but NOS or lightly used and matched Mullards are quite nice.
Y'all be safe,
Robert
VTL TL7.5 series lll VS VAC Master Line Stage VS AR Ref 6 VS Nagra Classic Preamp