Okay guys thanks for the impressions.
Is there actually a phone that is amazing-oh-awesome with electric guitars?
I had K701, which actually sucks with it, DT880 (but I miss the punch in the bass here, and the treble is a bit too loud) and now I'll try HD650..
seems like every phone is good at jazz/classical/acoustic but sucks at rock :(
Always thought about a Grado, but prices are craaaazy in EU
A phone that is amazing-oh-awesome with electric guitars is the HD800, it does an amazing job of reproducing different sounds of electric guitar awesomely well (for example the guitar in Satriani's Crushing Day sounds great and gives it the completely characteristic sound it deserves). One of my favorite traits of the 800 actually.
But I think for less stratospheric prices the HD600 is another pretty nice option, and for electric guitars I like it better than HD650 (and also than K701 and DT880), the 600 are slightly on the brighter side of neutral, but give a very nice rendition to electric guitars and are less picky of amping than their bigger brothers. Another can that does them pretty nicely is the DT48, but that headphone is completely different and for many people it might not be that enjoyable (it is a very different headphone than most models in the market today).