iPod compression

I’m not new to computers by any stretch, but I am new to iPods. I was going to rip some CDs in EAC, and make some high quality VBR MP3s. Now what I was wondering is if iTunes and/or the iPod recompresses those in any way to its own format? I don’t want to bother making these higher quality MP3s if they’re just going to be butchered by Apple’s software and/or the iPod.

iTunes does not transcode

So, by that you mean that the MP3 file I make and the MP3 file that ends up on the iPod will be perfect digital replica?

iTunes may modify the ID3 tags but other than that no.