I received a PM asking me about capture cards which I will answer publicly.
I have been researching and have considered the following:
Avermedia ExtremeCap U3 External (1080p 60 fps got my attention)
Avermedia Livegamer HD or HD Lite Internal cards
Blackmagic Intensity Pro Internal Card
Blackmagic Intensity Extreme (claims to connect to Windows PC via Thunderbolt)
Elgato Game capture HD
Do you have a preference on any particular one?
The ExtremeCap U3 has a ridiculous bug where 1080p59.94 is captured as 1080p60.00 with duplicate frames added. I guess it's a bug across all of AVerMedia's hardware, as the C127 card I have is supposed to capture "1080p60 as 1080p30" but instead of just dropping half the frames from 1080p59.94 it creates a 1080p30.00 video. The problem may be unnoticeable to most in direct viewing, but for example if you have a PS3 playing back 23.976 -> 59.940 -> 30.000 it's impossible to recover the original 23.976 frame rate. (I mention this because my own reason for buying the card was recording Vudu. I can just record 1080p23.976 Vudu direct from my WD TV, but I can't download my purchases to hard drive prior to capturing like I can on PS3. So I have to rely on my internet connection to keep up with streaming.)
Live Gamer HD [Lite] and Elgato Game Capture HD are hardware encoders, which don't interest me. You may have different goals.
Intensity Pro is well-reviewed. Intensity Extreme looks okay but I don't see any advantage for the much higher price. It's marketed to people who can't install a PCIe card, for whatever reason.