hogger how responsive are the controls to the time index on the X1? I find that super important. I like to be able to easily re-play the last few seconds. I am willing to pay for a scroll wheel if it can be used to easily replay music. That alone would get me to buy it. My midsized ipod finally died after many thousands of hours of use. I only have a small one that has the wheel. I have two midsized ipods without the wheel. They are fine for music since I normally play large play lists and maybe a few times a year will I actually play a single tune. My navigational needs are minimal when I listen to music. That is great since the new controls suck! They are terrible for audio books. As for 24 bit files... Our hearing is probably the least accurate and least reliable of our senses. Here is a link I like that addresses this short coming. Acustic Myth Workshop It is in the top sticky. This explains why persons can tell the difference between audios they really can't. Our mind plays tricks on us. We hear what we want to hear. Blind tests are the only true tests. One of the more amazing things I learned about psychoacoustic engineering is if your brain thinks it knows what note comes next it doesn't waste energy getting that note from your ear you just hear than note. How that actually works is way over my understanding. I can't understand why our minds would know what is next but apparently is can be expressed in an algorithm. What I gathered is just how sloppy our hearing is. It is primarily a warning system to sense danger coming from behind or in the dark. It lacks the precision of our vision which is our primary source of information.