Windows XP Pro vs Windows 2000 Pro

I’m forced to upgrade (at home) from 98 SE to either Win XP Pro or Win 2000 Pro. Which one should I commit to?

I have a Home Tower…with AMD 1800XP, 512 Mb Ram,
ATI 7600 Dual monitor Video Card w/64 MB, Dial Up for now but Cable (only choice here) soon.

I do Financial/Technical Analysis as a hobby, connect to a broker (the reason for this upgrade)
and may network 1 more computer in later. I’m really away from DOS (but like Fred Langa’s DOS
ToolKit/Rescue CD aticles and techniques). I’m not invested in many older programs

Both of the Windows O/S will be obsolete in 2008
or so, I’m told, Win XP still has lockup problems,
they say, Win 2000 is mature and the most stable, I’ve read……What to do? What to do?