Beginning of next year, I'm updating my HP Pavilion Slimline which I currently use as a server and turning it into an all-in-one HTPC.
It will still act as a server, upgrading the HDD with a big SSHD hybrid one and a reasonable NAND size (anyone have any experience with these?). Will also be updating the mITX mobo+ram. Waiting for AMD's Kabini board from AsRock (A4 preferably or A6), as the ECS board currently available doesn't inspire much confidence... and it's weird that Kabini only seems to use a single channel memory. I'm estimating the upgrade will cost me around 200-300 EUR.
This combo will give me a server with even lower power consumption and I think it has enough graphics to play digital/indie games on my TV. Could even use it to stream my desktop PC to the TV like a SteamBox and maybe even use WiiU's Gamepad as remote desktop/controller option.
I could also try Temash, or an Ivy Bridge/Haswell Intel i3? I still prefer low power (and heat) build; a silent, always on HTPC-server.
You think the Kabini board will be enough to play downloadable games? Still deciding if to stay on Win7 or go 8.1...