I would consider the NUC as a better solution for a HTPC.
Because the newer haswell version have a front infrared sensor, which is mandatory for me for this kind of usage (and the BRIX lack this).
Also, the previous post from ikkuranus kinda suggest that intel kit is missing the vesa mount. This is not the case, it is included, and the power cord only cost a few bucks (3$).
The intel kit have even more reason to win the match. A lot of third party company have already produced specific case for the NUC (and will update them for the newer version): Logic Supply, Chembro, Silverstone, Impactics, Akasa, ...
Most of these case are fanless !! The perfect HTPC is now a reality.
Some case (the one from LogicSupply) can even hold a 2"5 HDD/SSD ! And I'm pretty sure more case will follow this, as the newer NUC have a SATA connector on-board.
So as conclusion, the NUC Kit (or standalone board) is the perfect solution for building an HTPC, the more evolutive solution. The dream is about to come true, a small, silent, powerful HTPC, holding Tera-byte of multimedia content
The Brix are for the moment far far far away from this goal.
- front infrared sensor
- standalone board available
- third-party case available, which support fanless operating mode, and can hold HDD/SSD
- SATA connector on-board
- Custom Solution Header on board (GPIO, HDMI-CEC, DMIC, ...)
- wifi/bluetooth module included (can be buyed aside for the NUC of course)