I did a lot of research, decided against Shark and went with Ahren at CNC Router Parts. I ordered a CRP4896 4' x 8' machine with prewired NEMA 23, /steel machine leg assembly, and cable track kit. It cost me about $1000 more than the Shark but I've got 10 times the machine which can route a 4' x 8' sheet of plywood.

Thanks for all of your great advise.

Mazzy