Unless you just have to have
TrueHD/DTS-HD MA bitstreaming or 5.1/7.1 PCM you do not need the Radeon HD 5670 video card.
This Gigabyte 785g / Regor 240 Combo
will most likely under-volt a bit, under-clock and the IGP will off-load from the CPU a substantial amount of the BR decoding.
I run multi-channel PCM from the analog outs to my receiver. Sounds and works like a champ.