Processing Power and microsoft Windows Media Center Edition

When I built my First MCE based nobody told the processing power that I would need to wath that gorgeous OTA HDTV signal. Being the cheapo I am i cheaped out bought a single core processor and Athlon 64 3700+ to be exact. it was not later that I noticed the CPU being puished to its fullest when viewing HDTV, making browsing the channel guide while viewting televsion nearly impossible. This was remedied by moving over to a dual core procesor. Right now intel's Core2Duo is king of the hill as far as performance goes, but for those of us who have an older motherboard that we dont want to do away with, a dual core AMD processor or a lower end pentiumD are great economical options.