To the question about cost-effective room correction options, I use a mac mini-based music player running Dirac to good effect. This works well if all your sources are sourced over the network. Otherwise, you can run Dirac on a relatively low-cost device from MiniDSP. I haven't used them myself, so can't speak to the sound quality of this option, but they've been increasing their Dirac-based product line over the years, so I'm guessing people are liking them.
I hadn't heard about Lyngdorf, but I'll have to read up on them now.
I hadn't heard about Lyngdorf, but I'll have to read up on them now.