Flew my plane for the first time last night with the new G5 HSI and GNC255. Good stuff. I noticed the GNC255 gives you what looks to be full DME info (distance to station, bearing to station, time to station, etc) - pretty cool. Unfortunately, there is no Supplemental AFM that makes it legal to use as a DME - at least from what I can find. I believe the SL30 has the ability to be used as DME. Why wouldn't Garmin make their newest radio capable of being used as a DME, but the last generation radio was? Not a huge deal, we didn't buy the radio to be used as a DME, but it was cool/surprising to see all the capabilites of the radio included what looked to be all the info you would get on any older DME.