I just spent a little while making a bit of a list... please give me your thoughts on any of these... any I've missed?
Remember, I am in Australia, the prices listed are the cheapest I could find in aus with a quick search.
Multichannel Compressors
------------------------
Make-Model, Comp, Limit, Gate, Price, where?
Alto CLE4.0, 4, 4, NA, $ 245, musiclab.com.au
Alto ACL4, 4, 4, NA, $ ???
Behringer MDX4600 (exp/gate/comp/lim), 4, 4, 4, $ 265, musiclab.com.au
Behringer MDX4400 (comp/lim), 4, 4, NA, $ ???
DBX 1046 Quad Compressor Limiter, 4, 4, NA, $1149, proaudio.com.au
LA Audio C400, 4, 4, NA, $ ???
Prosonus CL44, 4, 4, ??, $ 996, musicianswarehouse.com.au
Alto CLE8.0, 8, 8, 8, $ 899, musiclab.com.au
SM Pro Audio OC8, 8, 8, NA, $ 699, highstreet.net.au
Presonus ACP88, 8, 8, 8, $1596, musicianswarehouse.com.au
Alternatively, replace my ADC with models that features a compressor/limiter...
Focusrite Octopre 8ch mic pre/comp/lim, 8, 8, NA, $2139, musiclab.com.au
+requires ADAT Addon @ $ 549!
OR
Presonus Digimax 96K, 8, 8, NA, $2595, brisound.com.au