I travel weekly as well, ain't business travel glamorous? When I travel by car I bring along my Swans M200 powered speakers and my Panasonic portable CDP. The Swans weigh 40 lbs and are bulky, not ideal for plane travel. But..damned nice speakers for the size and cost, highly recommended! Plane travel..jeez I had plane travel. Anyway, I've logged hundred of thousands of miles on planes and tried a few different set ups. First up was an older Panasonic CDP with a pair of Grado SR-60 headphones. Not bad sound, and the Grado earphones swivel so they lie flat. Handy, but the sound wasn't terrific and they're uncomfortable to wear for more than an hour. Next up...a Headroom Airhead amp, a new Panasonic CDP, and Ety headphones. I returned the Ety's after a week, so uncomfortable I couldn't use them. Maybe I have odd shaped ears, I dunno. My current set up is the Panasonic CDP, Airhead amp, and Sennheiser HD600's. Stuff the gear and a dozen CD's in a knapsack as a carry on and I'm good to go. Yeah, the Senns are bulky but worth the extra space, they sound terrific and I can wear'em for hours and hours.