My impression of FLOW(multiple songs): Vocals are definantly center stage, with balanced bass and guitar behind him and off to the left and right if I was to approximate the stage, I'd say 10-15 feet away from the singer, which is against the front fence for the stage security at a general admission concert, 15-20 feet wide (the 225i maybe 15-25 feet away, 15 feet wide) their play style in a lot of songs seem to be instruments accompany the vocals more than outperform them presenting a warm impression on me. I defininitely feel the energy from the drums and wish he was a little bit closer to the front of the stage and enjoy the aggressive style of the drummer. I think the Grado's did a good job seperating and emphasizing the parts they needed to.
Ne-Yo(on multiple songs) was a little too close for comfort. I don't think I ever want any male R&B singer this close to me, a little too intimate for my tastes(I hear him breathing right onto me). I think the vocals are emphasized way too much, he left the rest of the band on stage and is now on one knee handing me a rose on the 325is, I'd approximate about 5-10 feet away on the 225i.
I sampled and enjoyed the imaging on Till I get There by Lupe Fiasco. The piano off to the right was about 15 feet away the drummer was slightly off to the left at 12 feet away and Fiasco was about 7 feet away.
In terms of enjoyment I'd say FLOW>Lupe Fiasco> Ne-Yo
Grado's have a tendency to be really good at rock instruments (drum set, bass guitar, vocals, guitar) so I knew entering this review that FLOW would have the best performance on these, but I was surprised by Ne-yo placing last because I expected R&B to do well, I think this is the result of the 325i being too close for comfort and not Grado's in general.
I hope this answers your question. When people think it is one dimensional I think it is mostly that they are not used to being so close to the performers.