Don't forget there's capable compact options in the market. For the price of the P8Z77-V, you can get an Asus Maximus V Gene. To save some 30 % on that, get the P8Z77-M Pro - the tradeoff there is you lose Fan Xpert 2, but Fan Xpert+ is quite capable, especially for a First DIY System.
The Gene is mATX and offers all the features you could ask for (USB3.0, PCIe 3.0, SATA 6 Gbps,
Fan Xpert 2) and more (even does SLI and overclocking). No annoying little fans yet powerful cooling and that
macho colour scheme, thanks to being geared towards gamers.
TechPowerUp's review finds the power consumption figures good, although I don't know what to think of their method as I didn't go in-depth.
I am personally a fan of compact boards, as they allow for easier installation and compact systems. If you don't need a lot of expansion slots or some other feature of a bigger board, why waste all that space?