Like I saw to my kids: "you listen with your ears".
I'd give them a try first before commenting on them. Yes the graphs can be helpful, but I find they are ONLY helpful when listening to said headphones. I did own the HD650s...and both the SR225i and especially RS1s trounced them with rock.
I was watching "It Might Get Loud" on Blu Ray one evening about a year ago with my HD650s (and I am a HUGE Jimmy Page fan) and fell asleep. The HD650s were just so...blah IMO. I popped on my RS1s and really enjoyed the rest of the documentary to its fullest.