External TV tuner?

What's a good external USB TV tuner for a laptop? I don't need HD, but I want it to work with Windows Media Center(Vista), and, if it could work with Linux that would be great too. I have a 1.66 GHz Intel Core 2 duo and 2gb of ram. Any recommendations?

Whatever you do, don't go for hauppauge. There hardware dies quickly and tons of products come defective. I've had bad experiences with them... Just my 2 cents.

I have an AverMedia dvb USB TV and its very good