My home theater system was replaced last month when i upgraded my projector to Hi-Def.
My goal wasnt lowest cost, but something that could do everything i needed well and wouldnt need to upgraded anytime soon.
I use MC for almost everything on this system, exceptions are sage tv, for Live TV/PVR, and Megui for editing/compression of Hi def video
CPU : Intel Quad core q6600 - Many opinions differ here and none are right or wrong, i made this choice because multi cores is what i needed so that I could have 2 constantly working on compression, and not slow down the core i use to watch video, speed per core wasnt critical really since the slowest made will more than do the job so the 6600 being the cheapest intel quad out there was an easy pick. why intel? because......
Motherboard - intel DG45ID - Again i dont want to start a brand war discussion, but this board was made for people looking to do what we are doing, its really exactly what i wanted. HDMI, dvi, ir headers, firewire,up to 12 usb ports, esata, gigabit ethernet,hi def audio, microatx, 8 gig max ram, x4500 intel graphics, raid enabled sata, pci and pci ex expansion slot, and toslink optical out. i picked mine up for $110, widely available for $120
Case - antec nsk 1380 - Many better choices, but this one was really cheap and i am not cocerned about appearance right now, dosent look bad at all, just not a slick htpc case.
4 gigs ram (ddr 2 800)
Patterson usb to serial cable to drive my directv reciever
MCE remote
logitect dinovo mini keyboard
Hauppauge HDPVR for analog hi def capture
generic dvd drive /burner
1 1.5 TB drive for the system drive
2 750 GB drives for local RAID storage array
fitting the quad heat sink in took some customizing (read as "cutting peices off the fan assembly")
The system boots into MC, and in the background i have sage tv running as a service, and ill start megui to compress files as needed, but 98 percent of the time, theater view is my interface/operating system.
90% of that time I use the mce remote with the live tv button coded to switch to sage and the green key to start/switch back to jrmc (have to see how this will work with the latest builds mce remote changes)
Is this what you wanted?
fyi sorry for the typos