My personal thoughts: I like Bridgeman Downs, its a quality area. Lots of good quality, large houses on decent sized blocks, with a high number of owner occupiers. Some acreage. Mostly houses, a few townhouses along Albany Creek Rd. Public transport not so great, limited to bus service, but...
From Petrie Stn to CBD about 35-40mins.
Brisbane city suburbs I think of as blue chip: Ascot, Hamilton, New Farm/ Newstead, Clayfield, Newmarket, Woolloongabba, Spring Hill, East Brisbane, Paddington, St Lucia, Herston. Cheers, nat