Is there much difference between the retaining wall systems or is it just personal preference? I went to a versa-loc conference awhile back, they showed us how to install their products, how everything worked, gave us a complete book of info. It was great. The problem is the nearest supplier is 120 miles away. We have the pavestone and the belgard, but they seam to be low grade in my mind. Mainly due to the fact that you can buy them at lowes and home depot. One of the local suppliers provides rockwood. Which seams to be what everyone uses around here. Do they make a good product? Do they offer support? I want to start building "real" retaining walls, but I want to buy from a company that offers support and stand behind their products.