-HH- :
I'm personally contemplating on going for some super expensive headphones like sennheiser HD 700's and maybe a desk mic but for you I'd recommend something like the Audio Technica ATH M50 X's and a modmic or V-Moda mic.
Another suggestion would be the same cans with a fairly good desktop mic (Blue Snowball or something in that price range)
Audio Technica's are good, I have a pair of M50's , HD 700 good but you need to get a fancy DAC/AMP to power properly.
I personally like the HD800 much better than the HD 700's after trying both...