If you haven't checked out Voxengo plugins, do yourself and your mixes a HUGE favor and do so. All of their plugins are extremely high quality sounding at all settings, but their internal oversampling capabilities makes them complete game changers. If you're doing a project in say 44.1khz, you can set the plugins to run at twice, 4x, and 8x that sample rate internally. I've tried out a LOT of commercial digital EQ's and GlissEQ is definitely the best for linear-phase EQing and its dynamic EQ capabilities are unique, easy to use, and the filters are just really sweet even at normally sampling.
But if you haven't tried ELEPHANT.... you'll never use another master limiter again. It's an industry leader IMHO and I use it constantly. It's in the same price range as garbage IK Multimedia mixing and "mastering" software but the sound quality is on par with if not better than the Oxford. It's just one of those plugins. 8x oversamping can still sound very transparent all the way up to 5 or 6db gain reduction depending on the mix material.