I bought some bbc stuff on one of their black friday sales. Ludicrously inexpensive. I can have them checked out, and good parts installed and still be under half of what a pair of brodix or AFR's would run. 90-95% of the afr's power will still easily get my junk where I want it to run.
Plan on buying during the the sales, get the cnc bare, buy good parts to finish, i think youll be happy. Even if you have to buy complete, it'll still be a bargain.