Hi Jakk
I fully agree with HuFlungDung and further more consider that if the axis is running at high speeds the ramps mentioned have to be anticipated early enough so as not to run out beyond the desired route. This is caused due to the inertia of movement. In other words it's like when you hit the brakes hard in a car, although you mean to stop it ASAP it takes it's time to come to rest due to the velocity at which it was speeding. Like wise if, you are going too fast you might go off coarse and ruin the work you are doing and possibly damage the cutter.
For servo drivers, which can handle the load, have a look at
http://www.rutex.com. I have ordered a combination of drivers for my CNC that I am building aswell.