I've consulted Head-Fi before every audio purchase and I've always come out happy in the end, so I see no reason to stop now.
I currently have a pair of XB700s that I love, but the pads are getting really worn out and so I think it's time for an upgrade. My source is a PC, on board audio. I mostly listen to hip-hop, Dubstep, and Metalcore. I watch a lot of movies and TV. I also game a bit, but that's the lowest on the totem pole out of the three. I'm a basshead first and foremost. Sub-bass is important to me. I love really deep bass that just washes over you like the tide. I like my bass quantity and impact too.
I've got $200-300 to spend and I'm open to just about anything that fits the above description. My initial look turned up a pair of ATH-PRO700MK2s and ATH-WS99s. I couldn't find much info on how they compare to the XB700s though.