Here's another twist for you to consider...
Unless you have a real problem with your room acoustics, or a set of speakers with a specific frequency response issue that can be corrected with the help of an equalizer, the only need for tone controls at all is when playing at very low volumes, as in backround music, like dinner music in a restaurant, for example. At low volumes, the typical room acoustics seem to soak up the bass. That's the reason most receivers have a 'LOUDNESS' Buttom. At normal volume levels, however, you're supposed to turn the 'LOUDNESS' button OFF.
In fact, many of the best audio manufacturers today make what is called a 'line amp', like the ARC (Audio Research Corp) LS-15. It's a preamp with no tone controls at all, and no LOUDNESS button either.
In fact, aside for the terrible room acoustics I had in my first appartment, when the Soundcraftsmen PE-2217 did an excellent job of 'fixing' the problem, I use my PE-2217 with the EQ OUT. That is, with the 20 frequency band sliders completely bypassed, as with a straight wire. With a good music source, power amp and speakers, the best preamp is the one that imparts nothing to the sound at all... the virtual 'straight wire with gain'. That is to say, just enough gain to drive the amp as needed. All that extra circuitry just adds noise.
My next preamp is likely to be either the ARC LS-15, Conrad-Johnson PV-5 or the Placette Passive Linestage Preamp. Take a peak. Here's a LINK:
http://www.placetteaudio.com/passive_line.htm
All three have no tone controls of any kind. The ARC LS-15 doesn't even have a phone preamp stage.
And, you mention McIntosh again... the only MAC preamps I like at all are the old tube models like the Model 20 and especially the Model 22, IIRC, and they are very pricey today.
The beauty part of the Soundcraftsmen PE-2217 is that once you have your room acoustics sorted out, assuming that's possible, you can just bupass the EQ all together. The preamp is quiet and gets out of the way of the music, AND, most importantly, without adding that nagging upper-midrange 'sizzle' or 'edginess' that is so hard to design away, even among so many of the most popular brands, although, better caps in critical locations can often substantially lessen the tendency in many pieces.
