remember if you want to play in HD the device needs pass-through. no reason to record in 1080p, takes up too much space and most games are 720p anyway. if you get a dazzle you will not be able to play in HD
you can't record using a HDMI cable the signal is scrambled due to video copy protection. find out for sure before you order it. 9/10 people who record gaming in HD use the Hauppauge HD PVR.