@Pogre I'm amazed only 1 concert Blu-ray! I can give you many recommendations. If you at all like Eric Clapton, get Slowhand at 70 - Live at the Royal Albert Hall. I saw Eric live in Vancouver a few years back (amazing) and this is as close to him Live that I've heard. (I have a couple more of his Blu-rays and DVDs but nothing tops this.) What kind of music do you like?
I'm a metalhead at heart, and really love prog metal. Tool is probably my favorite band. My one concert Blu Ray is a band called Stain'd. A friend recently gave me a couple of Blu Ray audio rips of Porcupine Tree in concert that's mixed in 5.1 that's really growing on me.
I have a great deal of respect for Eric Clapton but in general he's not really my cup o' tea, tho I was huge into Neil Young when I was a kid. I like it heavy, bassy and intricate. Tool are known for their complex compositions, heavy sound, polyrhythms and odd, changing time signatures. SACDs and Blu Rays are very difficult to find for the music I really love.
*Edit: here's a great representation of Tool at their best. Danny Carey is truly one of the greatest drummers to ever do it. I put him up with the ranks of Bonham and Neil Peart.