I used to use a Solitaire. Their high dollar project studio board. The console did what I wanted. Gave me a clean signal path with automation. I could dirty it up with outboard gear. The eq works if you are boosting you hear it etc.. but not amazing. I did not like the compressors. They overloaded to easily. I also like the inline design of it.
As for the cheaper soundtracs stuff goes I have worked on a topaz. I prefer this to a mackie 8 Bus. The EQ was descent. The mixer felt cheaply put together though. Knobs had a wiggle to them ( the unit I used was about a year and a half old). Also aux 2 and 4 were not working I thought this to be strange on a board so new.
I got a Solo/midi a couple of years ago after unloading my mackie 8 bus. Better eq, more headroom. i only use outboard pres but the onboard ones will work if you need them. they seem a little darker/flatter than the mackie pres, but with more depth. not as 1 dimensional sounding if you know what i mean. i've been happy with it and have had no problems except for some l.e.d.'s on the fritz. best bargain in mixers as far as i can tell. I got mine for a grand. mc
I have a Solo Midi. I too like the EQs and as Michael Cleary said the pres are not great but not horrible either. It has Midi muting, if anyone still cares about that, and you can flip the jumpers internally for +4 operation.
I like it better than the Mackie 8 bus and Soundcraft Spirit which were its counterparts when it was new.
I used to use a Jade and a Solitaire. Their okay, not great by any stretch but with some decent outboard you can pull a good mix off them. I wasn't much of a fan of the dynamics on the Solitaire and the automation was IMO hopeless. It used to crash far too often for my liking.