I live near Gold Coast in a little village (as far as I can tell I'm the only xpat for miles!

). I'm in Gold Coast quite a bit for shopping, errands, banking etc and I like it alot. Better choice of restaurants than DB (I lived there for the first 8 mths I was here in HK; some good points, some bad like you say), nice choice of beaches, lots of hiking, and Tuen Mun is nearby with a big mall when needed. And its smaller than DB so fewer expats. I know Phase 1 of Gold Coast is shrouded in scaffolding now (upgrading the exteriors I guess...who knows how long that will last). There are tons of village houses too, probably mostly local residents, some with great views both sea and moutain.
There are lots of minibuses to Kowloon on Castle Peak Road, and good bus service to Central/Causeway Bay too. There is also a residents shuttle bus to TST...not sure of the schedule tho...There is a ferry service to Tung Chung from Tuen Mun, and a future ferry link from Tuen Mun to Central/TST is in the works, I've read. From Gold Coast to the ferry pier is prob. a $30 cab ride depending on the traffic. The ferry to Tung Chung takes 20min. It runs every 1/2 hr from about 5:30-11:30 for $15 one way.
However......Gold Coast Residence itself still seems like Plastic-ville to me... definitely not the authentic Chinese experience I'm looking for (as are you by the sounds of it). But it doesn't have that Stepford Wives creepiness to it that Disco Bay has....
Good luck with your search and if you haven't tried it, check out
www.gohome.com.hk as well.