This is a conundrum with "taper music," especially my own as my rig tends to get a little flabby in certain venues that I frequent. My ProAc D25's aren't as full-range as some, but I go strongly down to ~30Hz and this can cause issues with a few of my tapes.
I am of the "purist" mindset, too, and honestly I like full-range speakers much better than monitor w/sub. So I stick to that tack. But sometimes, I do wish for that bass contour/attentuation control... I seriously considered McIntosh for my pre because of it!
No real advice, I just feel your pain.