I have had a troubled relationship with HD280.
I purchased one as my first foray into headphone hobby, I was very impressed by them (since i hadn't heard anything better at that time) but slowly I just could not accept that this headphone is worth CDn$160, so I returned it.
During this time in a way I regretted returning the HD280, and thought to myself that maybe i did not give this headphone enough time.
Last month after a long time I purchased another HD280. After burn-in it started to open up and i begun to enjoy it, but things turned ugly.
First of all I begun to really get annoyed with the cable, then I realized how compressed the soundstage was, a few more days and I realized how fatiguing it can get with this headphone on. The headband really pressed hard on my head. I also disliked how any contact with the cable or the headphone itself while I was wearing it created a very annoying resonance. For example if the cable rested in my chest I could hear my heart beat!
I was finally convinced and dutifully returned the HD280 with full refund. As much as liked the isolation of HD280 and its balanced presentation, I just could not tolerate it anymore. I might be spoiled by HD580 and HD600 but I just could not justify to myself why i should keep HD280 as a closed alternative.