I like the Behringer - good value. I use it for small set ups, but for lotsa input channels I "stack" my two folio mixers. Folios do have a ladder LED display; one for the board. You can use it for the mian output or send any channel to it. The "idiot light" LED on each channel is used to set the optimum input gain for each channel.

Folio make great stuff, cheap. These really are top of the line products for moderate cost.

The sub mix can be used effectively, but you'll need some experience managing it. I would put those instruments that don't need to go through the monitor sends into the sub-mix - those instruments that don't need much attention, once their set. The sub mix won't behave like your main mix. You'll have to sepnd some time experimenting with what works for you.