I use Voxengo products every day and am still blown away by the quality of the EQ/filtering effects. GlissEQ and Redunoise are simply unique and can work wonders with poor source material.
The most recent purchase has been the Analogflux Suite. This really can impart a beautiful feel to a track. TapeBus is the best tape emulation I've heard yet.
You could pay thousands to get a plugin pack which isn't as good as Aleksey's plugs - they've certainly helped my studio out financially!
If you're not sure about buying a Voxengo product then download the demo and spend some time using it on your own mixes. I can't imagine how anyone could fail to be impressed.
Voxengo VSTs have become such a critical part of my mixing environment that I will never have a mix on my computer without them!!!
Aboslutely incredible how these VSTs mimic the sonic purity of the greatest analog gear ever invented...
Voxengo VSTs are the answer for any lacking mix. If you are not using these plugins, then you are missing out on the best sounding products available in VST format, bar none!!!