Hi Scott,
Don't know about the Commanche and the Hind, but I do have both Hueys and Trumpeter's Dolphin.
On the Revell-1:72 Huey: don't buy it. It's by far the worst Huey kit ever, ask anyone that built it. The Italeri-1:72 Huey, which is actually a re-box of the Esci-UH1D, would be a better choice.
Trumpeter's USCG-Dolphin is of the older AS365N-type, which differs from the Coast Guard Dolphin by having a smaller Fenestron (fan in fin) and smaller engine compartment. The kit is not bad (and ofcourse the only 1:48 365 available), but apart from the too small fenestron and the engine housing to me there seems to be a problem with the landing gear dimensions: let's say the kit looks better with the gear retracted.
Hope this helps, Good luck!
Gertjan