I just got 30GB (5thG) ipod, and there is definitely a problem with the ipods' bass.. With uncompressed files it's fine, but give a number of compressed sound files a try and you'll hear the bass distort soon enough.
I'm trying different compressions and formats to see what the best solution is. There's no doubt the sound is less good than a 30GB Creative of a friend of mine I listened to recently. IIRC the ipod's only got a 3 band EQ..
Movies eat up battery in a hurry.. If anyone knows what the best replacement battery is for 5th gen ipods, I'd appreciate the advice.
That said, the ergonomics are great. I've been told the screen is also less good than that Creative's, but honestly the ipod's already quite good.
It is surprising Creative puts out a better LCD than Apple, considering Apple's track record. The next ipod should adress this and the rest of its few shortcomings (Ebooks, richer EQ, etc).