The HM5 is a great headphone. It has thick soft pads, isolates very well, has dual entry detachable cables, and the build quality in general is good, it's a durable tank of a headphone, very big and bulky. At first the clamp pressure of the headband can be pretty tight, but you can loosen it by stretching it over something over-night for a few nights and it will loosen up very nicely. The sound is a warmer neutral. It can perform plenty well with bassy music, but it doesn't make non-bassy music into bassy music, so it's capable but not over the top. The bass is tight and punchy with good extension. The mids are great, not too distant, not all up in your face either, vocals and instruments sound like they should and it's not an overly recessed range. The treble is not too bright, but it's not dull. Good detail. Overall a great headphone for it's cost.
The DT770 is a little more fun to me, it has a little more mid-bass, better sub-bass, great mids, and the treble is a little more exciting (it's brighter). It's also built well, and comfortable, but doesn't have a detachable cable.
If you want something a little more closer to neutral the HM5 would be the one to go with. It really is a steller headphone for it's cost as a total package. The DT770 would be the one to go for if you wanted a little more bassy warmth and some more sparkle in the treble.
What about the DT 860 (185$) and DT 990 (260$) since they are on sale i don't mind paying the extra cash if they were best for me
Thanks man this is really helpful
Edited by K4Sait - 1/25/13 at 11:45am