over here the G540 can be found cheaper than the G530, check prices. (probably supply/demand) Mobo:
H77 good chipset choice, but that Asus mobo doesn't include a decent Fan Xpert version (+ or 2). If you want software fan control, I'd check sister models or Gigabyte.RAM:
get 8 GB (2x4 GB). Not only is it affordable, but your CPU's memory controller is dual-channel. 6 GB (3x2) would not work properly.Cooler:
65 W TDP on CPU so you can get just about any decent cooler, including compact ones. I recently helped assemble an HTPC build with the Scythe Samurai, but it blocked the PCI-E slot on a mini-ITX mobo and one of the screws broke with no spare in the package, so buyer beware. I would go Noctua for peace of mind, check out the most recent SPCR review!
WD Red is probably the best storage HDD at the moment for performance and silence. Only obstacle would be the budget, as they are currently a bit on the expensive side.
Of the list so far I personally like Fractal Design cases the best. Have been solid all around. Silverstone makes interesting HTPC cases that are living-room presentable, the Grandia series has some with hot-swap drive bays.