I auditioned many cans today and shortlisted the Denon D5K and Senn HD650. The Hd650 is much clearer and have a better soundstage (I think)compared to the d5k. but it is kinda lacking in midbass. I face the same prob with the lcd2. Would the d7k solve the prob, I may even jump to the th-900 if it's that good.
The D5000 has more bass than D7000, the D7000 will not give you that punch you are looking for. The TH900 look interesting.