Congratulations! If my experience is any guide, you will be very pleased with your purchase.
A PFF is attached showing the table and slot dimensions and spacing.
I have the standard Glacern 6" vise. This one has tabs on the bottom that can be used in the slots to orient the vise. They are slightly larger than the slots so they will have to be machined down to fit into the slots.
Don't be conderned with the vise weight..you have so much power in the servos I doubt you'll notice any difference in rapids or acceleration.
I only have the stock 2 hp motor on my mill and the noise is reasonable. I'm not sure what the 3 hp VFD will be like.