Best headphones under 800.00 USD

I will also recommend the HD600 and they sound great with any music I've sent through them, mostly jazz and rock.

I own the Grado 325's, the Senn 600's, and a nicer pair of AKGs. I highly recommend the 600's. They're reasonably priced, comfortable, and they sound great. I bought mine from the Headroom amp company and I'd recommend checking them out. They're price was lower than they are allowed to advertise on the site (under $300 if I remember correctly). I'd check them out (and they carry Grado too).

I own the Sennheiser 600s and also the 580s, and have listened to many others. On balance, I agree with Sdcampbell's comments about the 600's. The 600s are smooth and relaxing yet detailed-- also comfortable for long term listening. Cheers, and Good Hunting. Craig

There is a website called headwize.com that has a lot of headphone reviews and information. Use their search engine to save time.
My personal favorite is the Grado RS-2. I have tried the Sennheisers and like them but have found they need a tube headphone amp (like the Earmax) to sound their best. I have been able to get around the comfort issue with the Grado's by using the "comfy" foam pads and moving my eyeglasses off of my ears.

If you get foam pads that allow long term listening I would also vote for Grado