Spirit,
First off, congratulations on your new Def 4's. I'm sure you'll get them dialed in.
I finally got mine dialed in after many weeks and many hours of tweaking, moving them around, rolling tubes and a new amp. These took a lot of work to get right!
My final positioning is 12' apart with only 5-6 degree toe in, 1' off the rear wall and I'm sitting 12' back from the speakers. Sounds glorious! Vinyl, CD or anything I feed it.
I will mention that when Sean was here (back when I had my Def 3's) I had my speakers about 8' apart, and the first thing he said was "spread them out more". I did, and he was right.
Curious, do you listen to CD's and then vinyl in the same listening session? When I did this, vinyl never sounded as good as CD. And vice versa as well. Now I have all vinyl or all digital listening session.