I find the "tabooing of software eq'ing among purists" somewhat amusing, as certain tracks of pretty much all records they listen to were at some point subject to equalization, dynamic range compression, controlled distortion, artificial reverberation, and other effects. A recording is a mix of such tracks, and may have been further subjected to processing during mastering. If a recording was made in the last couple of decades, chances are high that the mixing and mastering were done digitally.
I think the equalization was given a bad name by the abundant low-quality equalization software from a decade or so ago, some of which still remaining embedded in popular software and hardware players. I personally got satisfactory equalization results only when I switched to Cubase - a professional Digital Audio Workstation - running on multi-core 2GHz+ computer. My Cubase headphones equalization stacks typically consume about half of a core on a 24bit/96KHz stream.
While "coloring" analog amps, especially tube ones, are not improving much (and many tube purists consider tubes from 1950-ies to be superior to contemporary ones), the digital processing power still grows exponentially (not so much in GHz as in number of cores on a chip). Sound processing software is getting better (for the same price) and cheaper (for the same functionality) with every year as well.
Exponential trends have a way of sneaking up on people - what was not true a decade ago is true today - one can buy an audiophile-affordable equalizer implemented in software (e.g. any high-end DAW) or hardware (e.g. Behringer DEQ2496), which is sonically transparent and really improves the sound instead of muddying it.