Since you like the interface of the iPod/iTunes better that should be enough reason to go with the iPod. It's unlikely for portable use that the Zune would be any better from a sound quality point of view especially if you're using a "lossy" file compression.
I use Apple Lossless since it is noticeably better sounding than any "lossy" format and put 300-400 cds on my 80 gig iPod Video and over 500 on my 160 gig Classic with room to spare. Your best sound quality comes from, I think, the quality of compression and quality of headphones.
As a plus, there are more accessories available for the iPod than any other player and you may find it useful to use the iPod thru your car stereo while driving. It sure beats carrying 400 cds.
I use Apple Lossless since it is noticeably better sounding than any "lossy" format and put 300-400 cds on my 80 gig iPod Video and over 500 on my 160 gig Classic with room to spare. Your best sound quality comes from, I think, the quality of compression and quality of headphones.
As a plus, there are more accessories available for the iPod than any other player and you may find it useful to use the iPod thru your car stereo while driving. It sure beats carrying 400 cds.