You might be interested in the receiver shoot-out I'm doing at the moment in which I'm comparing as many of the current crop of RC receivers as I can, measuring performance in a number of important areas such as noise-rejection, sensitivity, cross-mod/inter-mod, etc.

It will be interesting to see how the universally praised Hitec gear compares to offerings from the likes of FMA.

As for going to 72Mhz, I've got an Eclipse 7 with the Spectra module which I use with a Hitec Supreme and Hitec 555 receivers. So far I've had no problems at all -- except I'm going to have to upgrade the transmitter batteries to NiMh because the standard 600mAh Nicads are pittiful.