Modular Power Supply for Bitfenix Prodigy Build

Hey Everyone,

I was about to order a pre-built, but was talked out of it from the Tom's Hardware community. I am in the middle of picking parts for my first gaming computer build, a very exciting time. It is a mini-itx build in a Bitfenix Prodigy case. I have researched all the components and I am almost ready to order. Here are the main components:

CPU: i5 3570k .............$199
Motherboard: Asus P8Z77-I mini itx .................$196
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 .................... $55
Storage: Crucial M4 128 Gb................ $99
GPU: EVGA GeForce GTX 670 2GB ......$360
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer
Montior: Asus VS248H-P 24.0"
Power Supply: ?????????

I have heard that it is difficult to fit a Modular 160mm ATX Power Supply into the Prodigy case. I am hoping that someone could suggest a Modular 150mm length or 140mm length Power supply with enough power for my build (i'm thinking 550W-650W). Also, feel free to give suggestions on my other chosen components (I have not yet ordered and am open to changing them).

Thanks a lot for your opinions!