I am using the stock Pro Tools EQ almost exclusively after I've compared it to other plugins that are "meticulously modelled after the finest vintage analog gear";-). For me, it drilled down to the fact that the only sonic difference that I've noticed lies in the curves. And most curves can be dialed in with a versatile parametric EQ like the stock EQ from Pro Tools or Logic.
I have the Waves Gold+RenMaxx bundle with a dozen or so EQs (Qx/Ren), V-Series , SSL bundle and I have demo'd the Waves PuigTec Pultec-EQ.
The PuigTec had been the only one that really impressed me sonically and stood out of the bunch, especially when boosting high-end. Silky smooth. Still, I did not buy it (even for $79).
The Waves SSL-Channel's EQ is convenient because I like channel-strip style plugins. So I am using it on drums a lot.
I have to admit that I've never tried the newer stuff like the Scheps 1073 or the GEQ.