You could do worse than to start using linux. I am an old unix junkie and started using SuSE at about rel 6.1 (legally licensed). My HP came bundled with Xpensive and it occupies a small partition and an (unused) entry in Grub. I licensed Moneydance (about $25.00) and have no need for any M$ product or Quicken.
OpenOffice.org, tex/latex, any number of very robust spreadsheets, media players, robust SQL databases, compilers for virtually any language, and one of the best features is kshowmail, which allows me access to mail server on the ISP to delete suspect mail (needed because wifey still uses w2k.
I'm curious about Linux, especially Knoppix. I have a burner, but am on a dialup, though.
I'm going to run ME until it's threadbare and reeks of death before I'll go with Gate's "intellectual property" crap begun with XP. If I'm good enough to give him my hard earned cash, the product is mine. The record stores and Hollyweird can do fine without this old "commie thief" as well.