+1 for Hamilton Pine Rivers Club, based at Nundah Criterium Circuit. They also race at Lakeside, a brilliant old motor racing circuit. a quick entree into cycling culture in Bris if you train and race with them.http://www.hamiltonwheelers.com/
Zupps Aspley is the takeoff point for a lot of long northern burb rides - Dayboro Mt Mee; Strathpine Petrie Scarborough Sandgate loop. Sunday 615am groups start taking off. There's a couple of different levels so rides for everone. Last Sunday, 620am there were 100-120 riders gathered when I got there, which split into 3 or 4 bunches.
+1 for north side, esp if relies at bribie. If you want more nature, I'd favor
north east = Nundah, Northgate, Banyo, Boondall, Deagon/Shorncliffe/Sandgate.
north west = Everton Hills to Eatons Crossing.
The former has the Wetlands, Moreton Bay, and quick access to Gateway Arterial and airport. though it is true the Gateway is a parking lot during peak hour. fine at other times though. probably the lightest traffic and longest ride in Brisbane is Kedron Brook down to Boondall Wetlands, Boondall, Deagon, Shorncliffe, Sandgate, Redcliffe Peninsula. This is about 80km of low and slow traffic. all flat though.
The latter has access to Samford Valley and Bunya State Forest, and Old Northern Road which has a great shoulder (though this disappears closer to town).
I'm a northside boy though. If I was in your shoes, I'd get your work sorted first, then come up and have a sniff around for at least 4 days. I know a good Buyers Agent who is very methodical for things like this. Though I'd suggest you rent first. Prices aren't likely to go up in Brisbane significantly, even if we have an interest rate cut.
I knew Sans Souci well in the 1980s. Worked on the weekends sometimes for a mate who owned the Sans Souci pub. If you are partial to the water, I'd suggest you stick with the North East. The South East Bay burbs are very nice (Wynnum, Manly, Wellington Pt, Cleveland) but more exy. I have friends there but they always seem to be heading up to Brisbane or the northern burbs, where the action is.
I lived in the Western burbs (St Lucia, Taringa, Indooroopilly, Kenmore, Chapell Hill, Brookfield, Chelmer, Corinda, Graceville) years ago and the socioeconomic demographic is high there, but is exy, and a bit grid locked these days.
met a cyclist who moved up to Banyo from Maroubra last year, and joined HPRW. He is pretty happy with the move.