Falling-leaves, your system look very clean and trim to me.
I understand your current issue and know that your set up is only temporary.
Personally I see nothing wrong in where you have your BHK Amp right at the moment!
its always best sonically-speaking to have nothing in between your speakers to help/support the center channel image but its not mandatory.
Otherwise every vendor at all the Audio Shows would never display their electronics in between their speakers.
I guess it all depends on how far you want to take your listening hobby. Some Audiophiles get all worked-up over every little nuanced item and take it to extremes. Great if you have that ‘bent’ but sometimes its OK to have these little infractions for other considerations. Those who are married know what I am talking about, right?
Personally I am not a big fan of having a big amp stuck on the floor out in the middle of the room as it looks so untidy. But again, ‘each to their own’…
At least you can be complemented for choosing the right equipment for your electronic stack.
I have recently purchased the BHK Preamp and WOW what a very nice improvement to the sound of my system. I am amazed how much better it is compared to my previous preamp.
All the best with your ‘garage’ conversion.