It depends on how much compression you want to use. In theory you can store 10,000 MP3's on a 40gb, probably about 5,000 AAC's, and about 1000 WAV's. Some folks feel using AAC (Apple's proprietary format) results in no real loss in quality, while MP3's are quite a step down. WAV files are for the purists (like me) who believe that lossy compression of any sort is intolerable. It's worth trying the three formats out on the same song and deciding for yourself. As for tips & trips you're best to check out the iPod Lounge and do some reading, plenty there to take in.
http://www.ipodlounge.com/
I haven't tried the Shure's, I use Grado SR60's cuz they're comfortable, fold flat in my laptop bag, and cost ~$50. Wonderful invention, you won't regret it! Best, Jeff
http://www.ipodlounge.com/
I haven't tried the Shure's, I use Grado SR60's cuz they're comfortable, fold flat in my laptop bag, and cost ~$50. Wonderful invention, you won't regret it! Best, Jeff