I spent the morning and a good part of the afternoon tinkering with Sine waves in preparation for trying out REW. I use JRiver and there's a parametric EQ ioption to, it so I tinkered with a few "cuts" to reduce room peaks. I already had the RS SPL meter from when I set up a sub (no sub at the moment).
My system is hair shirt in many ways, i.e., no remote, only two inputs on the LDR preamp, which is the most transparent volume control I've ever had at home. Only two channels from a cheap as chips "digital" amp, but in my environment it does the business. However, I really believe cable construction and materials are inportant, as are equipment supports, mains supply and indiviudual component power supplies.
The dac is only 16bits, but has no digital filtering, sounds very natural. the speakers are almost full range, but limited HF extension, I know just how limited when i get the REW working.
I ordered a Behringer uca202 today, to be able to do the analysis correctly.