PSP master comp rocks...! but, as has been said before, different compressors for different songs... its just how it is. There's no one size fits all!
The waves ssl is OK, I didn't really get all that much from it... I'm a big fan of "the glue" esp for parallel compression. It can give a very clean sound imo. In terms if price its without competition too, 99 well spent! I also have Waves API for the same job on tracks that need more colour.
Lagerfelt's SSL presents for the logic comp work well too, which is a testament to the power of good ears and (i guess) good room acoustics over good plugs!
On the topic I guess I have to mention that the clearest compressor around, is no compressor at all! Look into soft clipping, eq, limiting and everything else, as well as your room acoustics/monitoring.