Sennheiser CX300. They're an old model now. Good quality.
Thats quite a lot actually. I'm re ripping everything I have to FLAC to be lossless. I think that would be detrimental to me.
Thanks though.
Your best bet is to try it yourself. It will always depend on your source material. I'm not saying that it downgrades everything to 192kps, just that it probably takes you one or two steps down in the level of compression.
I don't know that the CX300's are quite critical enough for it to be as detrimental as you think.
All that said, when you are really wanting to jam out, hardwired is the way to go (preferably with an amp in between).