Exact opposite of a Grado sound would be the AIAIAI TMA-1 (IMO). The 25-1 IIs are excellent headphones, but I find them to have a more neutral sound than I like for stuff like DubStep and Drum N Bass..
The TMA-1 is excellent for any EDM genre. Another option I'd suggest is the Phiaton MS 400. Both are more comfortable than the HD 25-1s IMO (I had real comfort issues with the 25s due to the fact I wear glasses).
EDIT: The Phiaton is probably a better 'all rounder' option than the TMA-1 because the TMA-1 has a very dark sound signature.
- I listen to everything from dubstep to rock, from trance to pop.
- Currently use a pair of Grado SR225i's modded with 2" Cocobolo cups
- Source is Creative Titanium HD/computer, no amp (Creative says it can handle up to 330ohms)
1) I'm looking for a pair of closed cans to complement my Grados. I've been looking at the Sennheiser HD-25 II. Are there any headphones that would better complement the Grados? Budget is $200ish. I figure since I'm not going to be using an amp the HD-25 II would be perfect since they are 80ohm and highly recommended for dubstep/drum and bass.