+1. I know a little more about placement now than I did before, so I may whip out the sub at some point just to see. Taking a ridiculously simple tip from live sound helped me tremendously and that was just sticking the sub in the corner. That has done way more than anything else I've tried to even the response in the room. My problem before was I had severe room modes room modes with the placement I was trying before. The bass would absolutely disappear depending on where I was standing. The combination of near fields and headphones is doing well for me now, so the sub would kinda be for fun and not crucial, but I may yet try it.
Guitarhacker
I have taken the time to experiment and learn the speakers I have, in the room I have them in, so the mixes are coming out fairly consistent and playable on most systems. That's what matters in the end.
If anything..... that ^^^^^... learning your gear and room ... is the key. With or without a sub.