Hey, it's been 3 months and I've been trying out some things a bit more. I am currently running the v2 subs up to 150hz and a Butterworth 24db/octave crossover between the low end of the mids and the upper end of the subs. I find that I really like the butterworth filters, they just sound better than the LR filters, to me. I think that is because of my approach to measurement and correction in each individual driver. I basically correct each driver to "perfect" frequency response without any crossover applied. Then, after that, I apply a crossover at the points that are logical. For example - the midrange driver dies at 1.2khz, even with correction. So I bring in the tweeter at that point. For the bass, the midrange starts to roll off at 300hz. I can correct it pretty well to about 150hz, but below that is just eats up amp power to keep correcting it. So I bring in the bass at 150hz now. Having established these points, it is now just a question of the type of slope used. After a lot of experimenting I've settled on Butterworth 24 as the slope that sounds best to me.
One nice thing about using HOLM Impulse for measurements is that it gives you accurate phase measurements. I never looked at them (you can turn them off), but I turned it on recently and realized that my source or my preamp was inverting phase, and that I got a better measurement (and sound) by inverting the midrange and tweeter phase to compensate for that.
Another change I've recently made - I put in 4 inch thick bass traps and acoustic panels in the front corners of my room for absorption and using my hex-comb blackout shades over my windows for diffusion and it makes a really big difference in sound quality. It didn't change WHERE I needed to make EQ changes in my drivers, but it did change HOW MUCH of a change I needed to make. I've come to the conclusion that the more you can make improvements in your room and the less you need to make changes via EQ, the better off you are. OB speakers deal with bass issues in the acoustic realm VERY nicely, and acoustic treatments work awesome for the mids and highs, and EQ lets you really dial in the last few percent.