Tritone Digital has just released V1.0 of its HydraTone EQ plug-in. Base on multi-staged convolution, it allows to blend both valve based and solid state equalization derived from historic circuits. You can mix them in your EQ profile, say one kind for bass, the other for medium and treble, save here we're talking of a 5 band EQ with fixed Bass and Treble, and fully parametric lo-mid, mid and hi-mid bands.
Now HydraTone doesn't stop there, you get also 2 filters, one on bass and one on treble to adjust the curves further. You have also a Phase control, a unique Fire parameter with his own valve coloration algorithm on the main output, with Blast to compress things till it's carbonizedů you select too the way the main output stage is modeled. Last but not least, to save CPU usage, Channel turns only the channel you need on not CPU savvy software platforms if the signal is mono.
HydraTone run on OS X 10.2 or higher, G4 IGHz recommended, up to 32 bits/96 kHz, VST, RTAS and AU support through Pluggo. Pluggo users should run the free Pluggo 3.5 update
. Before spending $149 you can try the "beeeping" demo
. And you can buy HydraTone in bundle with ValveTone for $199 ;)