We just installed one of the Mackie DX810 (actually came with RCF badging ironically) in a country club that needed basically background music and paging in 9 zones, plus the ability to input mics (both wired and wireless) into the system amongst various ballrooms, etc. I was satisfied with the ease of programming it, although the "combine" feature was a bit clutsy to learn, but overall very intuitive.
One drawback is that all program changes are global, so if you want to change from all the ballrooms playing Muzak, to all the ballrooms having mics hot then all other zones default back to however you saved the preset, e.g. Muzak at a nominal level in most rooms. This typically wouldn't be a problem except that you are limited to 9 of the remote modules, which can be any combination of volume controls or 4 button programmable pads which can change programs or activate room combinations, etc.
So, for example, one of the zones in this particular install is a bar. Behind the bar are 2 of the 9 remote wallplates, a volume control for Muzak, and a volume control for a CD player. There is a line into the DX810 from a wall mounted plasma screen TV also in the bar, and it is set at a nominal level in the program and the bartender can control its volume with the TV remote control. No problems so far, but when someone across the building decides to change presets from Muzak to mics in the ballrooms, suddenly the bar goes silent until the bartender turns up the volume control again.
Other than this somewhat serious limitation, the DX810 sounds good, and has plenty of features at a good price.
Hope this helps,
Don