The module boards I'm building are intended to also function as a small switching layout, and I was looking for a DCC system to do this with. As I also knew that the majority of the other modules in my area are controlled with a Lenz DCC system, I knew I wanted to build in at least one or two Lenz LA 152 fascia panels, so that a throttle can be plugged into the module when it's part of a larger set up.
I didn't however wanted to spend the full amount of a Lenz DCC system. Lenz has pretty much invented DCC, and is one of the best systems around, and carries the longest warranty of any system out there to my knowledge (10 years), which is re-asuring, but for a few module boards it is too much of an investment.
However my plans slightly changed when I came across a demo set in a local hobby shop, available at a significantly discounted price, so I've bought this, a Lenz set 100, which is their top system. This is overkill for the module, but I will install this on my home layout in the future, and use the currently used SPROG II for the modules when operating them as stand alone.
For a comparison of the Lenz 100 to other systems, have a look at this article on Model Rail Forum.