I just built a HTPC. This is what I bought:
Case: Aopen EX761 - $189
Cool appearance, silent operation, SATA and ATA-133, built-in GIGABIT ethernet (a must for transferring movies over the network), built-in sound, digital optical AND coaxial output, firewire ports in front and back, stable motherboard, 1 PCI-Express (hooray!) slot, 1 PCI slot, high-quality custom CPU heatsink, everything is pre-wired, and 275W power supply is beefier than most.
It's seriously da bomb. I own two of 'em... and may get a third. Warning: It hates Corsair memory (as do I).
http://www.newegg.com/Product/Produc...82E16856140021
Extra fans: Two Evercool 15mm width 80mm fans - $5.49 each
Recommended with the case above. One for intake, another for exhaust.
http://www.newegg.com/Product/Produc...82E16835119041
CPU: AMD Athlon 64 3000+ socket 754 Venice - $121
Agreed with PsychoZX on this one. Best CPU for the money right now.
http://www.newegg.com/Product/Produc...82E16819103537
Memory: Transcend 1GB - $75.85
Rock solid. Low price.
http://www.newegg.com/Product/Produc...82E16820208125
Video Card: X1600 PRO 256MB for $110-ish, or X1600XT for $145-ish.
Reason: Go with an ATI graphics card, because you'll probably want an ATI TV Wonder Elite as your tuner. Stick with the X1600 line. They are small, use less power than the X800 series, and support Pixelshader 3.0 (older ATI cards don't).
Pro:
http://www.newegg.com/Product/Produc...82E16814102651
XT:
http://www.newegg.com/Product/Produc...82E16814102657
Tv Tuner: Visiontek 550 Theater Pro w/remote & IR Blaster - $113
Of all the 550 Theater TV tuners at Newegg, this has the best included remote. The others are nasty... just look! Although the 550 doesn't do HD, it does have THE BEST analog quality capture you can get. It also tunes in FM radio which is cool. Throw away the CD drivers & BeyondTV software (install at your own risk!) and you're all set.
http://www.newegg.com/Product/Produc...82E16814129051
DVD Recorder: Samsung SH-S162L - $49
Dual-layer. DVD-RAM support. Insanely fast ripping speeds. LIGHTSCRIBE!
http://www.newegg.com/Product/Produc...82E16827151118
Hard Drive: 250GB Samsung Spinpoint SATA 3.0GB - $85
Quiet. Fast. Newest SATA standard.
http://www.newegg.com/Product/Produc...82E16822152025
OS: Windows MCE 2005 - $115
Keep in mind that since you are installing MCE from scratch, you won't get a DVD decoder included in the software. I recommend purchasing Cyberlink Powerdvd SE (available here:
http://www.cyberlink.com/multi/cyber...er_10_ENU.html). It's a high-quality codec which is fully compatible with Windows Media Player 10. Yes, it is an extra $15, but just do it. MCE is fussy enough as-is.
http://www.newegg.com/Product/Produc...82E16832102357
Keyboard & Mouse: I use a wireless device called the "Airboard" which has a built-in thumbstick and requires no drivers. Found it on eBay several years ago for about $20. Still use it, so no idea what's new in the wireless input device world.
Total price: $875-ish
No idea if it will do DVD-A or SACD. Coaxial digital output is supported. Regarding component video output, you might need a different video card. I can attest that the native VGA/DVI output looks very nice on my HDTV.