Stay with what works....Windows 7 works perfectly for me. I use Windows Media Center with HTPC and networked tuners...the forums are full of complaints regarding Windows 8 and Windows Media Center (which is a purchased add-on). The biggest advantage to upgrade is the touch screen. Isn't that why we have a mouse? The touchscreen is for tablets and phones....LOL.
Yeah, having to buy media center sucks! I use VLC anyway.