I have AKG headphones, and they're spectacular. K 240 MKII. But they have no mic. Still, AKG make some very good products.
(Sennheiser as well - some great stuff from them, but they can be pricey.)
However, I'm still thinking that Microsoft or Logitech are really about the best for price and effectiveness. Sure, you could shell out a truckload of cash for this or that, but really, there's that sweet spot where you get good quality at a good price, and anything better starts to cause you to bleed. I think Microsoft and Logitech have that sweet spot pretty much covered.
I've been very surprised at the high quality of some relatively cheap equipment. I've spent a small fortune on audio gear, and wouldn't do it again as there's little point to it anymore.