3-d sounding headphones.....

Ultrasones are incredible in this regard.

I don't know what you mean by dimension. If that means depth and width...you're not going to get that with earphones. You will get much better clarity, evenness of sound and lots of drawdroppingly good stuff from earphones, but the naturlness of speakers, and real instruments in real space can not be had. I agree with CKoffend. No one knows as much about headphones as do they. Just reading their website is interesting and factual.

Grado GS1000s have a big, open sound with lots of depth.

I do not know for the $200 budget. If you can ever find a pair of AKG K1000s used, they redefine the headphone experience; but they are more of an ear-speaker set close to your head than really being a headphone.

Sennheiser 650's... There is a good reason why they have the reputation as one of, if not the, best sounding headphones out there.

You will need an amp for them.