http://www.gradolabs.com/frameset_main.htm
I've used the same pair of Sony MDR-7506's on a professional, near daily basis for about seven years. They're very accurate, and more importantly, super solid. I mean, they're tools. And they work. About $100, and a really good value for money.
http://www.amazon.com/Sony-MDR7506-Professional-Diaphragm-He...
My sennhausiers (585) are a lot more comfortable. A bit clearer sound, a touch less bass, and way less reliable cords.
I've had the Grados since the early 90s, and the Sennhausers since about 2000.
I've been through several different sets of foam, some better than others, but they're still not nearly as comfortable as the Sennheisers.
http://www.amazon.com/gp/product/B000092YPR/ref=s9_simh_gw_p...
http://www.akg.com/site/products/powerslave,id,1063,pid,1063...