This kings langley property was sold recently. It represents value for money in my opinion. Still lots of good guy around if you are doing some serious searching.
http://www.realestate.com.au/property-house-nsw-kings+langley-117213643
Go for a drive / walk in all those areas mentioned in your thread at different time, and you will quickly know which area to avoid / to buy. Kings Langley is more close to hills area & norwest business park, and it offers value for money.