I'm really liking the Solid Gold FX Beta V at the moment. It has an ampeg flavour to it. Works great at low and high drive levels. No clean mix though if that is important to you.
I am also a big fan of the EBS Billy Sheehan Deluxe - a lot more versatile than people thing, and the Darkglass Alpha Omega.
Bit left field - but I love the kind of dirty drive the Fairfield 'The Accountant' compressor does when compressing a lot. It's absolutely horrible on its own, and just amazing in a mix.