CPU COOLER - The H55 won't do a better job cooling than a good air cooler like the Hyper 212 EVO below. If you want to stick with water cooling, look toward the NZXT X31 or CM Seidon 120M. The small Cougar case has you needing a low profile cooler (or 120mm radiator).
MB - The micro Anniversary lacks some onboard cooling. There are better options...
HD - The Seagate has been having more failures lately. Look toward the WD Blue.
GPU - The EVGA below sports a higher factory overclock and is cheaper.