Sort of thinking about a PDA...any info?

[skidooridr600]

Well, I'm going back to school and I want to buy myself a little end of the summer gift. hehe. So I was sort of thinking, hey a PDA might be sort of cool.
So I started looking around and I think I may want the pocket PC OS or whatever MS calls it.
But now I noticed the Palm OS can basically match the Pocket PC OS.
I don't think it'll really help me much in school, but I was thinking I might like to maybe download all the news and weather before I go, and then I could read through it when I have free time. Is there ways to do this? Also, I'd like to use it maybe as an MP3 player just for a few songs. Continuing, I noticed one is able to watch video on it. I was wondering how well this actually works. Finally, I definately want to use 802.11b on it.
The other thing I was thinking is I could keep my computer repair appointments straight and I could write down addresses or something. Any and all info would be just wonderful on your expierences with PDA's and maybe recommend one to me. Thanks guys!

Oh and for Price, heh I really don't want to spend that much on it, like $150 and I'll probably look to getting a used one.