Recommend me a new set of headphones for XMas

I've noticed the same thing. I mix with HD 280 Pros but lately have taken to making tiny changes, then mixing down, then listening to it on my computer speakers.. then when I get something I like there, I put it on my iPod and listen to it in the truck. The 280s have almost no bass so I find I always boost it too much, muddying up the sound, and the treble is hyped, so then they are too dark in my truck.. :(
 
I think headphones need to be available for certain things. A good pair of headphones seem to help me adjust ambiance and effects levels better than loudspeakers can.