I did loads of stuff on my showreel in various studios through the classic combo (in Europe at least) of Neumann U87
and a Focusrite Red.
But to be honest I think anything half-decent with a neutral sound and plenty of clean gain is going to work well on V/O. I'd venture to say that my own current set-up of a Gefell M930 and an Audient ASP-008 can hold its own against the above at half the price, and a number of TV & Radio commercials here are tracked through relatively modest SPL and TC Electronics preamps.
If I didn't already have the Audient I'd probably be looking at a simple 1 or 2ch clean unit like Grace or Hardy; mind you that SafeSound Tracking Toolbox looks quite sexy for V/O!
Choice of mic is (obviously) much more subjective than pre-amp on V/O, but even there, given plenty of clean gain, a decent talent should be able to make an SM57
sound passable at a push!