What comes to the discussion between MixWiz and Onyx, I think there are several topic in this forum about that and I do not see any reason to go that path.
However as we happen to have at the moment ONYX1640, and I happen to like it, I would say "go for it".
It is a nice "compact" mixer that has all the features you need in a mixer of that size. It has the sub groups, if you like to use them, and 6 auxes that can be setup to be pre/post individually. This gives you the option to do whatever you like with the 6 auxes.
I.e I've done following:
- 3 monitor groups
- 3 effects
- 2 monitor groups
- 1 stereo IEM (was a bit tricky, but doable)
- 2 effects
- 4 monitor groups
- 2 effects
- 5 monitor groups
- 1 effect
And yes, this console was the one that typically was sitting in small size gigs in monitor land and the we ran all 6 auxes to 6 monitor groups.
-> Now we use either LS9-32 or ONYX 3280 for that depending on the needs and wishes from the bands (you know there still are a lot of bands that wants to have analog console in FOH booth).
So if a Perkins EQ does not bother you, I would say ONYX1640 is a good choice, especially with that firewire option it gives...
FWIW,
-Minka-