Mapman,
You may also want to look at the Denon AH-D2000. They are only 25 ohms and pretty efficient. But like all headphones a real amp would improve the sound (more dynamic, better bass) but you may have luck straight out of your Squeezebox. I have never heard the AH-D2000 but they are suppose to be 95% of the Denon AH-D5000 at 1/2 the price, that I thought sounded very nice. For what it is worth Head-room (www.headphone.com) has a 30 day trial period so you could exchange them for something different if they do not work out of the Squeezebox.
You may also want to look at the Denon AH-D2000. They are only 25 ohms and pretty efficient. But like all headphones a real amp would improve the sound (more dynamic, better bass) but you may have luck straight out of your Squeezebox. I have never heard the AH-D2000 but they are suppose to be 95% of the Denon AH-D5000 at 1/2 the price, that I thought sounded very nice. For what it is worth Head-room (www.headphone.com) has a 30 day trial period so you could exchange them for something different if they do not work out of the Squeezebox.