Definately go with the PVR-150, not the MCE version. The standard version is built into MP but I've been fighting, along with many others, for months to get the MCE version to 'blast' the channel change to my satelite receiver. If you go with the MCE version you will have to use a plugin to make the blaster work. MyBlaster didn't work for me but I haven't tried it for a couple months.
This is the only one that has worked for me ....
(original thread) MCE Replacement Plugin v1.0.0
Hope this helps ... Dale