Mini dsp what's the deal


So I have been reading about mini dsp and am wondering what is the best one to go with? Is it good enough for a main system? I am looking at the 2*4 hd and the one above it. My room is not great but i think it sounds pretty damn good. If I can get it better with time alignment crossover to sub etc without sound degredation for a reasonable amount I would be all in. Also I don't know what the hell Dirac Live is? Any comments? 
mofojo
Make sure you get the H/D version as it has digital input, always better to have this one. Don't put your mids and highs through it, as your own dac/cdp would have a better converter. But good for doing the bass and room correction, but you'll need the minidsp calibrated microphone, and get the $10 remote too.
https://www.minidsp.com/products/minidsp-in-a-box/minidsp-2x4-hd
Cheers George
I gave up on expensive music servers and room correction in boxes bundled with compromised audio sections aka pre-pros and receivers. Why not Live Dirac on computer? It's the cheapest path towards quality corrected digital sound without extra A/D and can stream music and play blu-rays. Go Roon, Tidal, Jriver!

Agree with the additional treatments AND dirac.
Or use an Antimode 8033 for the sub(s). The unit is cheap, and easy to set up (automatically). You can use it from the pre amp output or at speaker level (with an attenuating cable). It does not need a computer, so it can be used with all your sources in identical fashion.