I live 5kms from the town on the northside and for a period of about 2 years worked outside of town. I don't think I set foot in the CBD for those two years. So yes, CBD is not required.
I had to build my own shed to get something that I wanted (and figure if i move again will have to do it again).
I personally would recommend Kepera/Arana Hills/Ferny hills. Older areas, but definitely undervalued. I reckon it is one of those areas that can eventually only go up (around the 10kms mark from town). There are some brick homes, but mostly older 2 story places, with lost of large blocks (got a place with 1000m2 for around similar money to my 550m2 block 5kms from town).