If the were terrible before the trouble of modding and now there nothing to write home about...That doesn't sound like a ringing endorsement for $400 headphones. Am I misinterpreting?
Before mod, the bottom end is just plain sloppy. After, tight, punchy and fun. The midrange is nothing to write home about, it's decent, but no where near as clean as the 701's, and doesn't have as much detail. High frequencies are about a catch 22. If you're looking for a critical, natural, clean phone, the AKG's get my vote. On the other hand, if you're not concerned about critical listening, and you want a fun phone, that's also comfortable, good punch in the bottom end, the D5000's are a real HOOT!