I have a Vampire 600 V2 in my A600.
It really puts this old system to new heights.
Compared to my A4000 with 68060 it's a lot faster.
The digital display output can only do a stable 800x600x16. I have heard the Vampire 500 can do more as they have changed something at the hdmi connector surroundings on the board.
All in all it is my system of choice of the classic ones because I can actually do development on it and have compile times that are acceptable. With Gold2 core it's all pretty stable.
Most of the WHDLoad games work as well. So that's nice, too.

I'm currently getting my A1000 renovated to put a Vampire in.

Don't know about the standalone. Will see when it's there.


Manfred