Before you correct, maybe just get the Umik-1 and measure your room. If you find that you have peaks or nulls, you would benefit. I personally use a miniDSP SHD with my vinyl rig. It’s transparent to the vinyl sound and really helps below 500Hz. In my opinion, almost every domestic room would benefit from some DSP and treatments. However, it boils down to preferences. If you are used to your room, you may not like the corrected sound. After Dirac and touching up a few problem areas, my response feels uniform across the spectrum and I can hear details that otherwise were obscured. Things sound more real to me too.

Ted Denny is the king of Snake oil.