Personally I wouldn't listen to compressed files even on my ipod. The ipods are pretty cheap nowdays for 120GB and storage is super cheap. Don't waste your time ripping files to MP3. There is a dullness to the sound that is audible on an ipod plugged into a car stereo and it's just not worth it.
I think you'd have to have another complete copy to reduce the file size, so you'd have to keep your original and then make another copy and reduce the size, then you'd have 2 qualities floating around in your itunes for your home system.
I think you'd have to have another complete copy to reduce the file size, so you'd have to keep your original and then make another copy and reduce the size, then you'd have 2 qualities floating around in your itunes for your home system.