Hey Chami,
Nice setup! I looked for some small rack mount line mixers yesterday just out of curiosity and this one, the Samson SM10, looks pretty good for a one rack space, especially for the price of $199.00
http://www.samsontech.com/samson/products/mixers/sm10/sm10/In the post I made earlier describing how I use my mixer you have to remember that all my channel strips are mono (except for two which I use for synth input). So when I said that my set up required 4 aux sends this was four mono aux sends being used as two stereo sends. So keep that in mind.
The SM10 has 10 stereo inputs (two of which have mic level xlr inputs along with line level TRS), four mix busses, and two dedicated stereo returns.
On each input channel you could mix to the main stereo outs, a stereo monitor out, and a stereo FX out. The monitor out is pre-fader and the FX out is post-fader, which is exactly what you want.
So on each input channel you have four knobs -- volume, balance, monitor send, fx send. Don't worry about the fact that the "monitor" and "fx" sends are named what they are -- think about them as separate stereo mixes.
So for example, if I was to wire this up so that it worked just like my current setup that I described above:
MP-1 out --> SM10 stereo input 3
Stereo Compressor out --> SM10 stereo input 4
Lexicon out --> SM10 stereo input 5
SM10 inputs 1 and 2 I wouldn't wire anything to because this is where the two mic inputs are and I would leave those available for that use.
SM10 Monitor mix out --> Stereo Compressor input (this is pre-fader send)
SM10 EFX out --> Lexicon input (this is a post-fader send)
This setup would work exactly how my current wiring scheme described above works.
The SM10 is more than it appears for a few reasons:
All inputs are balanced, which in the long run is a good thing to have in a mixer. They are also switchable between +4dBu and -10DBV operating levels.
Main stereo outputs are paralled -- so you could drive your power amp/cab and also have a dedicated (and balanced) feed for front of house or recording feed.
It has a headphone out on the front panel and a monitoring switch that allows the headphones to source either the main mix out, alternate mix B out, Monitor bus out, or EFX bus out. This is very handy to have.
There are master volume knobs for the main mix, Monitor mix, and EFX mix.
For a one rack-space mixer, it's pretty nice. For the price, it's very nice!
Anyway, check it out at the link above.