Without a doubt Windows 7. Windows 7 is pretty faster than vista. It also support a most exciting feature Windows XP mode to run Programs which doesn't worked in vista. In fact vista was not much user friendly according to me. In fact I felt XP was better than Vista.

I think the Apple's 16 gb iPod is the best and it can suit anyon'e need. I am telling this from my personal use. It's simply mind blolwing with excellent music quality and sound effect.