So I received my Outlaw LFM-1 EX today, and I can't wait to get it integrated into my system tonight. However I have my old baby sub, I think it's the Sony W2500 or some such. a 100 W little 10 or 12" sealed subwoofer. I can't really imagine any way that the two subs could be any more different.

The question is do I try to incorporate them both into the room, is it worth it? or should I just forgo and use the one by itself? Any thoughts on the issue are appreciated!

As long as the Sony doesn't detract from the Outlaw you should be good.

Try them both, then try the Outlaw on it's own and go with what sounds best to you. I tried my cheap old sub with the PB 13 and I couldn't even tell the old one was on

That's sort of what I'm expecting :)...so if worse comes to worse maybe it can simply smooth it out a bit across my room even if I can't actually hear it.