We've always had my brothers old Pieps 475 analog beacon as a extra or backup being he rarely goes with but I thought It was time to upgrade it for him. Our group has either Pieps DSP or Tracker DTS. I know that the Tracker DTS is a two antenna beacon although they have worked good when we've tried them out. I see Pieps now has a Sport and Pro model on top of the original DSP. The Sport is cheaper then the original DSP but I can't see were it is missing any features. Also when we bought ours before there was a local guy that basically sold all avalanche stuff at a minimal profit but I don't have his contact info anymore. Were is the best place to get a beacon.