1. No Ocing untill build in compleet and the cooling (will need a cpu cooler if Ocing) is satisfactory.
2. CORSAIR Builder Series CX600 600W at newegg 60$
3. Keep your eyes out for something like Western Digital RE3 WD7502ABYS 750GB 7200 RPM (refurbished) at newegg for 55$ http://www.newegg.com/Product/Product.aspx?Item=N82E168...
now i see why people have had problems with the full size 160mm depth psu's that are fully modular. No room for the modular plugs. http://www.newegg.com/Product/Product.aspx?Item=N82E168...
SILVERSTONE ST65F-G 650W ATX 12V v2.3 / EPS 12V SLI Ready CrossFire Ready 80 PLUS GOLD Certified Full Modular Active PFC Power Supply
Compact 140mm Depth Design for Easy Intergration
If you want to use a fully modular power supply (which you do fully modular is much cleaner) you need to find one that is 140mm depth to allow enough room for modular plugs.
And I see you are getting a bundle deal but Asus's mini itx board is the best. It has the vertical vrm card to give it the same power delivery as a larger board as it makes room for the vrms on a vertical card. No one else has that in the mini itx form.
Also I think it's best to remove the 5.25" drive and use a 240mm water cooling setup such as the corsair h100i over putting a big unwieldy heatsink onto the mobo. Better performance and the heat goes directly out of the case, so only the gpu, ram, and mobo will leak heat into the case, helping the temps of everything else as well since the cpu heat is no longer inside the case.
Bigcyco, shouldn't the PSU be flipped upside down so the cooling fan is getting fresh cool air for the psu through the bottom vent on the case?