I agree with you on the fact that the standard headphones that come with the iPod aren't much for comfort or sound quality. Logitech has some decent headphones on the market, such as the Logitech 980435 series (http://wize.com/headphones/logitech-980435-cons...).

However, if you are a true music aficianado I'd like to steer you towads looking at the Sennheiser CX300 headphones (http://wize.com/headphones/sennheiser-cx-300-co...). They have adjustable earpieces for comfort and does a darn good job (for the price) of shutting out unwanted noises. The sound quality is also very good for such a low price.

Logitech makes good keyboards and mice, but I have yet to find a pair of headphones from them I like.