Video Capture Card(s) *Need One*

[Bondy]

Ok Halo3 is out and i want to start capturing some video, so i need a video capture card that allows me to either:
Take VGA/DVI directly into my pc and play it on a program (this would be xbox video output to pc)

OR

Take VGA/DVI through a card back to my xbox moniter and still let me view it on my pc moniter (this would be xbox video out to capture card to xbox moniter.)

Im looking for a cheap one but not a crap one...so im guessing from £40-£100 is my limit depending on how good it is.

Thanks in advance