I wouldn't go with the Boxwave's over the Hori's myself because it looks like they are a company that makes a general purpose screen protector for all kinds of things with screens, and they just cut that gen. purpose protector to fit the DSL. The Horis are designed for the DSL touch screen. It may be a load of BS, but they are also cheaper and generally regarded as the best, so why go with a one size fits all protector for more money?
So I'd say you made the right choice.