Okay, problem is, the price on the auction just spiked, and is at about 50 bucks now... is it worth it to bid?
Why get the 600 ohm version for portable use? Its no better than the 32 or 250 ohm versions and you'll have a much harder time reaching the volume levels you need. I recommend the 250 ohm version if you plan on also using them with a desktop amp at some point, or the 32 ohm version (or the 80 ohm version in the case of the 770s) if they will be used exclusively as portables.
True, the 600 ohm version is available used locally, the 250 ohm or 80 ohm professional ones (even the 32 ohm) are available locally new. I would like to have a good balance between portability and for at home. Would the D4 be able to power the 250 ohm version? the 600? If not, what amp (affordable please) would?
Thanks for all your help, very much appreciated