With its beautiful screen and Wi-Fi, the touch subtracts your computer from the song-management equation. Throw in Web browsing and this gizmo may even remove the computer from your bag. After all, why lug a laptop when you can email, surf, and download Kanye from your iPod touch? It’s relatively weighty (4.05 ounces) but slim, and 32 gigs of storage give it grown-up media-player chops. We just wish the battery lasted a bit longer.