Just 3-4 ft away. Neither pair of speaker should sound good in this configuration, but both sound wonderful to me.
In all honesty, though, I’m definitely not hearing the soundstage/imaging either pair of speaker can do. I’d need to get at least 5-7 ft away from them--and also get them 3-4 ft away from the back wall, to hear all that their capable of.
But even in the nearfield configuration, I can get a very good picture of speakers’ tonal characteristics, dynamics, and so on.
I think the 30.1s have a truly lovely sound. I listen to a lot of classical music and jazz, and they are ideal for that. If all I listened to was rock, dance music, etc, the 30.1s probably wouldn’t be my first choice, those they still sound damned good when I (very occasionally) crank them up.