Yes, with different sized speakers and stud alignments, off setting with the art to balance things out on the front wall is a great idea...
Not everyone has this capability or forward thinking, I think SVS has a good product to market for the DIY kinda person that can't or doesn't want to afford the Custom Installer to get involved.
Your taking that extra step in thinking for your customers and I commend you for that, in fact I would suggest that to get more sales of that particular line of products for you to offer to your customers - I wouldn't limit yourself to acquiring the license for a print such as the "Star Wars" unless a customer is adamant about wanting that theme and then passing the "Cost No Object" on to them... I would think you would have many more reasonable choices without adding in those elevated prices. Of coarse I'm sure you have plenty of custom installs that are a completely "Spare No Expense" scenario and that's awesome.
I personally looked at a large amount of Art Acoustic panels, as I can't really see hanging bland ugly tasteless 2'x4'x4" or 2'x2'x2" panels around my house, but still needed to remove some ringing from the room... But a great deal of them were pretty expensive, depending on size as you have already stated....
I'm sure you have already given all this a great deal of thought without my blathering, this is also meant for the lay person scanning the threads....
Maybe you could keep us posted in how your results come out, with a thread and pics... Good Luck in your adventure...
In the end - the point here is Acoustic Panels and good quality sound DOESN'T have to be though of as ugly - Can be tastefully done, and can easily pass that sometimes ridiculous WAF factor