To clarify, I'm not looking for bass canons, I have M100s for that. I just wanted to experience the "planar bass" that everyone talks about, but the M560s are rather flat in the low end compared to what I expected. I am considering M1060s, but they cost more than the M560s and the HE4xx and I don't want to have to spend even more money on mods. The 4xx seems like a safer buy considering the 1060s QC issues, 5k ring, etc... and the reviews I've read giving the 4xx a more neutral, pleasant and laid back sound rather than the forward, exciting and in-your-face 1060s. I just want good, cheap planars that I'm not required to mod after buying. Is the M1060s sound signature extremely different from the M560s? Reviews seem rather polarized. I'm a college student, so I'm not exactly made of time and money, so I'm leery of spending $300 on a pair of headphones, and another $100-$150 "fixing" them with mods. I could get the 4xx and a killer amp for that money.