ASUS P7H55D-M first time builder - please comment

[woodhands]

Hi,

I'm new here, hoping for some experienced eyes on my first-time system build. Here's the plan, all from Newegg. I had CyberPower do my last PC 3 yrs ago, but they won’t use the new AUS or Gigabyte mobo’s - besides, it’s time I did this myself! Will use this for about 3 years, so definitely want USB3 (I've read 6Gb sata is not so useful). I load lots of software - WP/MS Office, other general purpose, photo editing (rarely video editing, but some conversion), large photo and music collections, utilities, etc. Primarily interested in good speed, and avoiding the "hesitations" I get with Windows on my core2duo Asus mobo now (3 yrs old).

Here's what I'm ready to Order:

- APEVIA X-QPACK2-RED/500 MicroATX Desktop Computer Case 500W Power Supply
if the p/s is not good, I'll swap my 520watt Corsair green p/supply in existing PC
- ASUS P7H55D-M EVO LGA 1156 Intel H55 HDMI USB 3.0 Micro ATX Intel Motherboard
- Intel Core i5-660 Clarkdale 3.33GHz LGA 1156 73W Dual-Core Desktop Processor BX80616I5660
- CORSAIR XMS3 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) MX4GX3M2A1600C9
- Arctic Silver 5 Thermal Compound - OEM
- nMEDIAPC ZE-C98 All-in-one USB 2.0 Card Reader with USB/IEEE 1394/e-SATA Port/HD Audio Ports
- HDD - 1TB Seagate 7200 rpm drive (re-use a spare I have)
- LITE-ON Black 24X DVD Writer Black SATA Model iHAS424-98 LightScribe
Will use onboard sound and video chip (presently have Radeon HD4550 and it's more than I need; no gaming, occasionally watch BD video).

Some Questions:
1. I plan to do some moderate overclocking - chose the 660 chip to keep heat and energy use down; is the 661 really a better choice?
2. What is best CPU cooler for this small case and MoBo, with limited height?
3. What am I forgetting about?

Thanks for your time and sharing your experience,
woodhands