I've been away from the hobby for a few years now. When I got away from it Spectrum DSS was the new rage. Since coming back to the hobby, I find that the world of DSS is more confusing than 72MGH ever was. All these various manufactures want to have their own proprietary DSS radio systems, and I guess alot of that is because of fear of patent infringements.
If you're shopping radios, my suggestion is to pay the extra bucks to go with a high end brand name like Futaba. For that matter there are many good used radio systems for sale.
You might check out the classifieds You will quickly see how the top brands command the highest used prices.