I have New Age Pro Series and I am very happy with the quality and sizing. My friend has the step-down version and they are nice but not as deep and the doors are not double lined like mine. I still think both versions are good but if you can swing the "pro series" I would go with those.
This is how it started. I have since added the upper cabinets around the whole garage and I have an attached storage room that has 4 floor-to-ceiling cabinets. The fridge in the photo has also found it's new home (not garage). I also had one extra lower cabinet (in front of the 911) that was extra due to me buying kits. I added a sink and since my laundry used to be in the garage, I had existing plumbing.
I ordered mine thru Home Depot online. They were delivered on pallets and very well packaged - heavy though.