This has not been mentioned here, but in my experience, using dipole speakers (especially dipole bass) is a very effective way of reducing room interaction to start with (as in LXmini / LX521 speakers).
Digital Room Correction For Speakers
Any suggestions for a digital room correction device which is easy to use. Or is it better to buy a pair of speakers which has the system built in such as Vandersteen. Any feed back is appreciated.