since you have them, i’m

since you have them, i’m curious why you want to drop the Linksys extenders? I ask because they’ll probably consume significantly less power than the XBox360’s would. Those also would draw way less power than any HTPC you could build.

you don’t mention if you’re going with the HDHomeRun PRIME CableCARD or just the standard one. That will impact what i say next, depending on whether you need to worry about copy protection or not for the higher channels.

The Core i3-2100t should be able to record that many programs fine, but where you’ll definitely hit the bottleneck is going to be on driving extenders if you’re maxing out your recordings. How much RAM do you have?

Also, you don’t say what your WHS is built on, but in addition to your hard drives the platform is something else to look into.