On the other hand I have occassional back problems that I'd rather not have, such as completely debilitating lower back pain for a few days every couple of years. Everything that might help looks appealing then.
Have you read anything by this guy http://www.bookloons.com/cgi-bin/Review.asp?bookid=2650 The Back Doctor Hamilton Hall.
I listened to an interview with him where he described surgery on a patient's back. The spine is covered by large muscles, and one of his co-workers was convinced that spinal manipulation could 'align' the spine. He hooked onto one of the processes with forceps and challenged the surgeon to move the bone at all.
He also suggest that since most back pain subsides in three days that there's good money to be made by treating backs with blue light and offering a double your money back guarantee if the pain isn't gone in three days. The math is very encouraging since blue lightbulbs should be real cheap.
His major point is that you can strengthen the muscles and correct your posture, building a bank account of support. Then if you want to play basketball you can draw it down a bit. You can have a bad back rather than being a bad back.
As far as spinal manipulation goes, many physiotherapists can do that, too. You get the treatment without the mumbo-jumbo, and they may just find, as they did with me that what I thought was a muscle pain in my leg was cartilage in my knee. She fixed it.