My Shelby+Kroll Nano Monitors and dual Woofer Monitors are crazy good in the near field. For your listening at 6' a single Woofer Monitor would be sufficient. The imaging of the S/K is spooky real.
When the S/K Nano Monitors were first delivered I had them set up on a counter top and couldn't believe what I was hearing. Superior height,depth, and width to the sound stage, with perfect tonal balance. When the stands showed up I put them about 3' off the front wall and 8' apart. From my chair they sounded exquisite, but here's the cool part, when I would get up to turn off the gear (rack in middle of front wall and against it) I would stand about a foot in front of the speaker plane and still enjoy a 3D sound experience! Feels like you can reach over and smack a cymbal.
I first heard the S/K Nano Monitors and Woofer Monitor at a guys house and were about 6' apart and sounded great there too.