I got a classic to replace my 30GB Ipod Video after it was stolen.  It has decent audio quality with a good set of IEMs but lacks the power to drive a set of larger cans.  It does have a bit of lag as others have said but is not really a big deal once you start listening to music and is unnoticeable when jumping from tracks, however there is a company that makes a kit to convert them to use a compact flash cards which would take care of any lag and can be had in capacities as large as 128GB.  The classic is extremely tough and I have had for about 4...