My favorite 1176 plugin emulation is the newer Universal Audio one. I was using the CLA one when I ran out of DSP, and it seems OK (I recently got a bigger UA DSP thing, and so I've kind of stopped using the CLA one). Seems like I bought the bundle of CLA compressors on sale for maybe 149? 199? Not sure - anyway, that was during their holiday sales, and you might have wait until year end for that.
The CLA 1176, like a lot of the Waves plugs, has built in noise and harmonic manipulation (but mainly it sounds like noise to me) - usually billed as "Analog" or something in the user interface - you set it to 60hz or 50hz (for US or British power cycles, I guess) or off. When it's on, there's a hiss, and it drives me nuts. You can set the default to be off, but then if you use the built in presets, it gets set back on again. Then you hear a hiss through your monitors whether or not you're in "play" mode in your software. I have spent way too long picking through
tracks for the instance where I left the noise on. Recently I even got something close to a real 1176 (the 6176 channel strip) and it's not nearly as noisy as the CLA
plugin - I guess they're modeling older, noiser units, of course. Anyway, something to think about.
edit - one of my favorites is the Stillwell Rocket (
http://www.stillwellaudio.com/plugins/stillwell-audio-plugins/rocket-compressor/ ), the mantis shrimp of software compressors - I'm using a 64 bit version which works fine, but I think the company is about to do a fresh release of all their plugs in 64 bit. Can't wait...