After owning an Atlas, I just went with the new Bob's Action Jack on my new Yellowfin 24.
http://www.bobsmachine.com/products/...jac_series.cfm
I know Atlas has a lot of units on the water, but my Atlas cost me $400 over 15 months of ownership - down twice. 1) gradual leak down issue just sitting on the trailer or running; 2) the other was the ram lacked torque to trim boat over 50 mph. Warranty covered parts only, NOT freight or labor. That was my experience. I know of several guys that will not buy another Atlas. Others will say their Atlas has been flawless.
I know this though the new Bob's is quicker, smoother, quieter and stronger. Good luck.