I decided to give Postgres a try at home. There's a very nice Postgres Windows Installer that I used. It comes with a handy little GUI frontend called pgAdmin III as well. You can automatically set it up as a service, too.
So, here I am, creating a convoluted database to store my record collection. If you're familiar with Oracle, it should feel familiar. Seems simple and straightforward so far, which is good.
Verdict: thumbs up.