I can copy paste my answer directly from another forum
Suggestion of what I have in mind:
* Case: Silverstone Grandia GD04
Has some advantages over my original choice (Antec): stealthed ODD, so activity led is hidden; free choice of PSU; case is less deep and bit higher. Disadvantage is the limited heigth of HSF when mounting an ODD : <70mm
Original choice was: Antec NSK 2480 Not expensive, comes with a decent 80+ 380W PSU, looks good (simple).
* PSU: Nexus Value 430
Only if I stick to the Silverstone case. This PSU is modular and should be very quiet. 430W is more than needed for this setup.
* Motherboard: MSI H55M-E33
Seems enough for what I need: 4 memory slots, HDMI out (with right CPU), onboard LAN/audio, 3x PCIe & 1 PCI. It's also the cheapest I can get.
* CPU: Intel i3 530
A 2.93GHz dualcore with hyperthreading seems more then enough for what I intend to do with it.
* GPU: don't think I need a discrete card, as the CPU should have a relative powerful IGP. If it doesn't work out I can still add an ATi HD54xx/55xx card afterwards.
* RAM: 2x Kingston 1GB 1333MHz DDR3 CL9
2GB should be enough for Windows 7 while running some video tools.
* CPU cooler: Scythe Big Shuriken
This is about the only HSF that fits the Silverstone GD04 when mounting an ODD : <70mm. Cooling/noise should be OK.
* Bootdisk: Crucial RealSSD C300 64GB SSD
Faster than all other value SSD's I found. 50% more expensive compared to Intel X25-V, but it has also 50% more space.
Original choice was: Intel X25-V 40GB SSD 40GB is enough for HTPC as everything will be stored on a NAS. Read speed is fast, write speed mediocre
* BluRay reader: Lite-On IHOS104
I lack some user feedback on silent Blu-Ray readers. I prefer read quality & silence over speed. A simple black front is a plus. It doesn't even have to be able to write DVD's.
* Keyboard/mouse: Enermax Aurora micro wireless
I've read good things about this device. But it's getting used to the integrated trackball, and it's not that cheap. So maybe there are better alternatives.
Cost: about €650. If that's too expensive you will have to drop the SSD & go for an AMD setup