This will be my first mini-ITX build as well! I had an AMD FX-8350 rig until the OS decided to take a dump and I decided to get a fresh start. Unfortunately, there aren't any mini-ITX motherboards for AM3+, so I have to make the pricey switch to Intel. I'm most likely going to go with the ASUS Z87I-Pro motherboard when it's released. It's likely going to be cheaper than the Z87I-Deluxe, but with 90% of the features of the Deluxe.
I actually had to dig around quite a bit to find a suitable PSU. I could've taken the easy way out and got the Corsair CX600M, which was semi-modular and very suitable for this type of build. But I wanted 80PLUS Gold efficiency and full modular cables so the cable lengths can be fully custom. I decided on the Silverstone ST65F-G, and I already ordered custom length sleeved cables for it, which hopefully will just be long enough with some slack. I'll post pictures when I get the case and install the motherboard and PSU into it.
I really wish ASUS didn't go with the gold/black theme on their Z87 motherboards though. It matches absolutely nothing, my case theme is going to be black/white, so gold probably won't mix in very well. Eh, maybe I can get the new Corsair Vengeance Pro RAM in gold to match it.