Dedicated DAC is a 2 channel thing for music. It is a component higher up in the chain.
For movies, there are decoders, room correction, channel/level equalizers etc etc.
So why do you need a DAC for movies?
Is it to take movie 5.1 (or higher) down-mixed to 2.x and feed a DAC.
Any EQ when used correctly will alter the sound to suit your room and ears.
That is its function. Personally, I like tone control, I want tone control at least.
EQ is a bit overwhelming to tweak and use depending on content.
Bass and Treble +/- 6 to 10 dB is nice and practical for most instantaneous tweaking.
For music content/source, DAC will be something you will have to try with your existing setup and listen.
But then genelacs, as you say, only accept XLR. Expect DACs to have this output to be expensive.
Some companies to DAC + pre. Most do stand alone DAC.
Cheers,
Raghu