DirecTV D10-100

[cjacks9]

That's my DirecTV box. I'm in the process of putting together a machine and buying a tuner card to begin my PVR experience. I'm debating if I should get the Hauppage 500 card for the dual tuning capabilities, but I have questions:

How difficult is it to record two shows at once? I'm sure on would be recorded through the coax cable, the other using s-video and the a/v inputs. But what about changing the channels? I've read that the IR Blaster will be required, but only works for one tuner (and only one IR Blaster per card period), so I'd have to use another method for the second tuner. Perhaps the USB IR Blaster. If so, can I then actually watch a third channel on my t.v. during recording?

The more I type, the dumber I think my questions are. But I have to be certain. Thanks in advance.