For a non-overclocking, non-gaming, PC, here is what I'd go with. I actually just built about 3 similar systems.
[url=http://pcpartpicker.com/p/G4Nj]PCPartPicker part list[/url] / [url=http://pcpartpicker.com/p/G4Nj/by_merchant/]Price breakdown by merchant[/url] / [url=http://pcpartpicker.com/p/G4Nj/benchmarks/]Benchmarks[/url]
[b]CPU:[/b] [url=http://pcpartpicker.com/part/amd-cpu-ad5500okhjbox]AMD A8-5500 3.2GHz Quad-Core Processor[/url] ($104.99 @ Newegg)
I'd go with the A8 for the lower TDP, and lower cost. It's still a quad-core, so very similar to the A10 for your uses. In my experience with the A8, the 100w unlocked counterpart got toasty unless I allowed the stock cooling to sound like a jet taking off. Keeping the cooler at a managable noise level, temps got up to 74c at stock clocks. So the 65w part should be a lot more managable with stock cooling, while offering solid performance.
[b]Motherboard:[/b] [url=http://pcpartpicker.com/part/msi-motherboard-fm2a85xmae35]MSI FM2-A85XMA-E35 Micro ATX FM2 Motherboard[/url] ($79.99 @ Amazon)
Cheaper, full feature motherboard. Unless you need ITX, I'd just bite the bullet for space consumption. It's still going to small form factor as a mATX mini tower.
[b]Memory:[/b] [url=http://pcpartpicker.com/part/corsair-memory-cmz8gx3m2a1600c9]Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory[/url] ($47.98 @ Amazon)
Better price per GB.
[b]Storage:[/b] [url=http://pcpartpicker.com/part/seagate-internal-hard-drive-st1000dm003]Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive[/url] ($76.82 @ Amazon)
Same drive, free shipping w/ Amazon
[b]Storage:[/b] [url=http://pcpartpicker.com/part/samsung-internal-hard-drive-mz7td250bw]Samsung 840 Series 250GB 2.5" Solid State Disk[/url] ($155.52 @ Amazon)
Again, better price/GB. Also, this thing is stupid fast. I just finished a build with the unlocked A8 using the 120GB version, and it boots Linux Mint 14 Cinnamon 64bit in 10 seconds, no joke. And that's from a cold boot. Completely off to the login screen in 10 seconds or less.
[b]Case:[/b] [url=http://pcpartpicker.com/part/fractal-design-case-fdcadefminibl]Fractal Design Define Mini MicroATX Mini Tower Case[/url] ($99.99 @ Amazon)
Quiet, small, solid quality, tasteful desing. What more can you ask for.
[b]Power Supply:[/b] [url=http://pcpartpicker.com/part/seasonic-power-supply-ssr360gp]SeaSonic 360W 80 PLUS Gold Certified ATX12V Power Supply[/url] ($59.99 @ Amazon)
Given my recent experience with Corsair, I would avoid them. I got the CX430, and it was DOA. It took corsair over 2 and half weeks to get me a replacement. Mind you, I live 30 minutes from their office, and it took USPS 2 days to get them the power supply. They received it on the 12th, my replace just came today (25th). Also, the Seasonic is more efficient. I'd just bite the premium and wattage cut for peace of mind. Not like you're going to use the extra wattage.
[b]Optical Drive:[/b] [url=http://pcpartpicker.com/part/samsung-optical-drive-sh224bb]Samsung SH-224BB DVD/CD Writer[/url] ($17.99 @ Newegg)
A little cheaper. It's an oprical drive. Plus free shipping.
[b]Total:[/b] $643.27 (All shipping free)
[i](Prices include shipping, taxes, and discounts when available.)[/i]
[i](Generated by PCPartPicker 2013-02-26 02:08 EST-0500)[/i]