The main thing with Firefox is that it renders the page very similar to IE within reason (a lot less pages are broken) and also has no ActiveX, so automatically you're not affected by half of the exploits out there.
Dual Monitors 1024x768 each
I got average vid card, GeCube ATI Radeon 128MB 9600XT. Does CS:Source @ 50-100FPS so I'm quite happy with it. I got the main one on the VGA, and then my card came with this DVI -> VGA converter thing, which the second monitor runs on.
I bought this HP 128Mb MP3 Player from cworld. It's never run out of battery (used it for about 6 months for 4 hours a day), and it's still working perfect. I still use it to quickly transfer files, but for music I use iPod 20G now.