I will be giving the HFI780, HFI580, MDR V6, and XB700/500's a try. I just need more input to see which ones are worth seeking out if GC/BB doesn't have them. So far, I only see GC possibly having the DJ1/580's and BB having a broken pair of XB500's, so my luck doesn't seem so good right now. Where would I test the 780 or the V6? Any other ones worth looking out for around this $200 budget?
I believe you can test the 7506's at guitar center. They are the same as the v6. The reason that they aren't a 'classic' on head-fi is that they can sometimes have harsh highs (at least to some ears). Also they are not bass monsters out of the box. You may be able to eq them to be but they are far from bass heavy.