My next question is are there sfx psus that can run an i5 3570k with a 4-4.2ghz overclock, a gtx 690, optical disk drive, and 2-3 hdds? I really like this case but I think my gpu is gonna limit me to matx cases or a bigger mitx case that can take a regular psu.
Further to what Serephucus says, you'd be right at the limit of the highest power SFX unit (=450W).
Luckily, the NCase M1 can hold a small ATX PSU. Silverstone do several 140mm length gold efficiency PSUs that would fit this.