Location of compoments.

It is preferable not to have racks between the speakers - mainly on account of diffraction. However provided the rack is even a little behind the plane of the speakers, it's not an absolute disaster. Sometimes, as in my own case, there is simply nowhere else in the room to locate the equipment.

@bdp24 - Pete Townshend played his Tele with Marshalls in the '60s. And Jimmy Page may well have as well. But then, the JTM 45 is a hot rodded Bassman anyway so there is Leo Fender DNA in Marshalls anyway.

@yoyoyaya: Townshend played a Tele in the 60's? That I did not know. I saw The Who in '68 and '69 (fantastic!), and neither time was he playing a Tele. In '68 he was still smashing his guitar to end the set, and there is no way to break a Fender guitar.

@bdp24 Must have been cool. I didn't see the Who until much later on, 1982 It's Hard tour. Before the concert in Vancouver in rehearsal Pete decided to swing his arm around the guitar and the whammy bar went right through the middle of his hand. Doctors said there could not have been a better spot for the impalement- no severe damage. 

Don't know which guitar this was. 

Mr. PT played a lot of different guitars.

My current setup is totally between the speakers, but back against the wall.  I bought a pair of long XLR cables and moved everything into an alcove to the left of the speakers and I lost a bit of soundstage on the left, so I moved everything back.