I believe in an overwhelming consensus of opinion. The Jh13pro received a huge number of reviews and most of them were in agreement regarding technical ability and sound signature. That's why I was willing to spend the money to pick them up. I'm willing to take some risks but once I hit the $1000+ mark I'd like a clear idea as to what I'm going to get.
Well, the V200 amp and Westone ES5 had an overwhelming consensus of opinion and positive reviews, but were mediocre when I listen to them. Nowadays, I'd rather listen to the few who either review negatively or is ambivalent about it, verify the authenticity of his findings based upon his prior experience and reputation, and then choose.