Here's a bunch that I use, YMMV:
Waves: RCL (compressor), L1 (maximizer), and the EQ's are all very, very good. TrueVerb is probably their weakest link... it's okay but a tad complicated to use.
Sonic Timeworks: Mastering compressor (similar to Waves L1), Mastering EQ, and CompressorX are very good. The metering on
CompressorX is practically useless, though. I tried their reverb, and it's okay and easy to use.
Freeverb is okay, and very easy to use. It's a little limited, but free.
Sonic Foundary: Noise reduction and clipped peak restoration are essential if you
have to salvage stuff. Using 'em is almost an artform in itself, though.
Steinberg: The "Puncher" kicks mucho ass (especially for drums). This is a VST plug-in, not DirectX, but you can get an "adapter" program to run VST under DirectX. The only downside I've found is that it's waaaaaaay to easy to over-do it and not realize it until later.
Cakewalk: The EQ and reverb are not killer, but they're functional. The delay is pretty good, but any delay should be pretty good (it's harder to screw up delay).
I've heard tons of raves on the Arboretum reverb, but I haven't tried it. I will, though, since none of the other 'verbs I've used are particularly stunning.