Excuse my ignorance, but what is the advantage of a higher ohm version? I see the seller phandrew linked to is selling them (32 ohm) because he wants the 80 ohm version. I don't think I will be getting an Amp, mostly driving with the onboard sound from my motherboard. I assume this means that the lower ohm rating the better.
I don't want to jack this thread, but also am against starting yet another "Which headphone to get?!" thread, so I'll just ask here. I was also looking at the ATH-M50 headphones, and had also considered the Grado SR80i phones. Of course they are inherently different, one being closed and the other open. I think a closed set would probably be better, as to not annoy anyone else happening to be in my room, but I'm really open to anything. Remember I won't be using an amp.
Currently I'm on an old pair of Sennheiser HD 202 phones, how much better sound quality can I expect for a pair of $100-$200 headphones with onboard audio? I listen to rock and electronic music mostly, but also do a fair amount of gaming. I don't at all consider myself an audiophile, and really don't have much experience with headphones.
Thanks for any help!