I have been using a set of Sennheiser PX100 open-air headphones as my primary audio output for my main rig (gaming, music, movies) for the past 3 or so years, and have grown to love them (my first foray into headphones made by a "reputable" company).

While they still sound as good as the day I bought them (utterly phenomenal), I can't help but feel like I'm missing out somehow by using a set of portable's as my main audio output, especially considering they never leave my desk, and I have lots of portable devices that it would be much better suited for (my GP2X F200, for example).

I know they sound unbelievable, but what of the higher end models that aren't build to be portable? Surely they would sound just as good, if not better, since they use larger drivers and probably have better positional audio using my X-Fi's CMSS3D.

So my question isn't whether or not I'll be buying a new set of cans, but exactly which set. So far the only ones within my price range (under $100) that I have found suitable are the Grado SR60's and Sennheiser HD280Pro's.

I just need some recommendations, the Grado's seem to be the way to go from all the reviews, but I just want to make sure I'm not missing anything here, as I'm not a real audiophile...I just appreciate good audio.

Thanks in advance, +rep for those who can help me here.

I know that Beyer Dynamics and AKG also make some great quality stuff around that price. I'd check the Head-Fi forums for some reviews from pro auidiophiles.