Compatibility Check - First Time Build

Approximate Purchase Date: Soon, not very important though.

Budget Range: $500, flexible.

System Usage from Most to Least Important: HTPC & file server.

Parts Not Required: Keyboard, mouse, monitor, speakers, OS, HDD.

Preferred Website(s) for Parts: Newegg.

Country of Origin: Pacific NW, USA.

Parts Preferences: No preference.

Overclocking: Doubtful.

SLI or Crossfire: No.

Monitor Resolution: 720p HDTV through HDMI, possibly also 1920x1080(1200) through DVI.

Additional Comments: I would prefer a smaller case, but there is no need for it to be HTPC form factor.

And here's the build: (prices include shipping)
Case: APEX TX-381-C $35
CPU: Intel Core i3-2105 $140
Mobo: MSI H67MA-E35 $85
RAM: G.SKILL Ripjaws X Series 8GB (2 x 4GB) (PC3 10666) $55
PSU: Antec EA-380D 380W $40
Front Fan: Scythe 120mm "Slipstream" $14
Boot SSD: Kingston SSDNow S100 16GB $55
Total price: $424

1) Are parts I have chosen compatible with each other? (Also, will they fit in the case?)
2) Is there a better choice for something, such as a cheaper item that has equivalent capabilities?
3) I'm thinking of setting up RAID 5 by purchasing a pair of 2 TB drives that complement my current 2 TB drive. Is this a reasonable idea, and what manufacturer is most reliable these days?

The parts I'm the most iffy about are the PSU and SSD, since I have little experience with either.

Thanks!

EDIT: More stuff I've found, please let me know if you think I should use one of these.
SSD: Patriot Torqx 2 32GB $85 (thanks manu11)
Mobo: ASRock H67M-GE (B3) $80
Do I want to fill the 4 DIMM of RAM here, or is 16 GB overkill?
PSU: SeaSonic SS-300ET 300W $40
Case: Antec 300 $60
Wifi: Rosewill RNX-N180PCe Wireless Adapter $20
DVD: ASUS 24X DVD Burner $20
Do I need to purchase extra cables due to the DVD burner being OEM?