Compressor round up!

[Hollowcell]

OK as a few of you know I'm gunna be updating the PC and I thought while I'm in the process of spending money, why not spend more money.

So the outboard rack will be getting a make over with a few new compressors.

A DBX160a is a definite (really like what it does for bass, and I've wanted one for ages), but I'm not sure about which stereo compressor will meet my needs. I don't have a heap of cash and I will be buying used (buying used puts Fmr's RNC out of the running as I never see them second hand here).

I'm after something that can remain relatively transparent, but still add a certain "punch" and "characture" (specially to drum tracks) when pushed hard enough.

The choices are:
Focusrite Compounder.
DBX 166xl.
PreSonus ACP 22.
PreSonus BlueMax - seems a bit gimiky though.

Do any of you guys have any experience with any of these? Or is there anything else I should be looking at?

Thanks in advance.