Over the years, I've noticed a lot people complain about "muddy midrange" and it seems a lot of times it is associated with bass-heavy music content. I've experienced this myself. But when they listen to the same song on speakers with less bass capability, the "muddy midrange" isn't as bad.
IMO, when you buy a tower, you are paying for potentially inferior bass that could potentially adversely affect the midrange.
The bass quality of many tower speakers, especially under $2K, will not be as accurate and tight as say a $467 HSU VTF-1 MK2 sub. The tower bass will have a Q-value of probably over 1.0, while the HSU can have a Q-value of 0.3 (as good as it gets). Lower Q-value means tighter bass. The distortion of the bass on many towers may be 10%, while the distortion of the bass from the HSU may be 1%.
So IMO, why pay for $2K towers with inferior bass that could "muddy the midrange"?
As far as which bookshelf speakers and subs, there are many out there to choose from. For example, the $219 each NHT Absolute Zero (critical listening window frequency response from 200Hz-10kHz +/- 0.9dB is as good as it gets). They had a sale on the Absolute Zero a few days ago of $175 each, so if you call them they may let you have the discount. They also give you 30-day trial.
So you get the best of both worlds IMO. Window RF +/-0.9 dB (as good as it gets for FR) for midrange and tweeter and Q of 0.3 (as good as it gets for Q-value) for tight bass. And the bass output will, of course, put most towers to shame.
HSU VTF-1 MK2 x 2 subs = $934 delivered, 18"H x 14"W x 17"D
NHT Absolute Zero x 2 = $438 (or $350 if they still give discount) delivered, 9.75"H 5.625"W x 7.25"D.
Wood Technology speaker stand FGH-26 $80, 5.5" x 5.5" top, 11" x 10" bottom, 26"H
Just one example of what I would do with the budget.
Don't you just hate all these possibilities ?