Are these L/C/R speakers too close together?

They are NGX NX-Pro 4 speakers, all the same, can be used in vertical or horizontal position. Right now I have them spread across under my plasma. I have watched a few movies (with the sub too) and they sounded pretty good. This is a real budget setup - 3.1 also.

Ignore the Advents as they are for my 2 channel listening.

Pic:

Okay, I understand about the L/R placement. I have some other stands, and I'll give them a try. The speakers on the wall are Boston Acoustics Subsat 6. I was using these with the sub a while ago.