The nuforces just died, so I sent them back to Amazon. The reviewers were complaining of durability issues, but I bought them anyway. The sound wasn't great, nor was it bad. The background sounds weren't very clear and the bass was nothing like users here made it out to be. They were just 'OK'.
The only in-ears I've had were:
Can ANYONE do a comparison with these? Preferably a comparison with the Nuforces, since they were the last I used, so I can remember exactly how they sound. So far I've read that the Brainwavz M2 had a stronger bass than the M4, but the M4's were more detailed. I'd like a strong bass (I know I won't get any rumble besides the Ludacris phones) with some clarity, but I couldn't really find a good comparison.