I looked at the vtl TL 2.5 and its phono section recently.
TEchnically, I think I recall it would work alone with most MC cartridges save perhaps those with very low output, like a Denon DL103R. I think a step up device of some sort would be needed there.
The Dynavector is high output I believe though so it should work fine I would think.
I personally would have tried the built in phono first before going outboard were I to go with the VTL, but if you know what you like, or depending how finicky you are regarding phono playback, you certainly could use an outboard phono preamp as well.