Capture Systems, Help me Giantbomb

So I am looking at getting a capture system so I can get screens and videos mostly for guides. I know that some of the Users of Giantbomb have capture systems and since the community is so knowledgeable I was wondering if anyone could fill me in on their personal capture system or just a good option. I would prefer to be able to capture HD but its not really a requirement for me.
Anyway thanks for the help

I know Brukaoru had some sort of capture system... but I think it might have been for Macs.... Might want to try and PM her.

There's also this, which is cheaper than the other black magic device.

"
The BlackMagic Intensity is pricey, but it's quite good.
 
 http://www.blackmagic-design.com/products/intensity/techspecs/
 
A pimp-nasty PC with bitchin-fast drives is abso-fucking-lutely necessary to capture in HD, otherwise you'll get dropped frames.
 
There's also the Blitzbox and soon Blitzbox HD:
 
http://www.blitzcast.com/  Yes.  Hauppauge makes good products as well. "