Bent certainly produces the best low cut surface for golf and bowls and it is a beautiful grass. Management of this grass in humid and/or hot conditions can be very tricky. That being said there are plenty of courses here in Adelaide that have bent greens so it is do-able. I have spoken to a couple of superintendents at courses about various turf related topics and they have been pretty happy to share some knowledge. Might be worth a call to get a baseline for the best steps to get it established through winter and ready for summer.
SimRice, I had a chat with a couple of guys at Royal Adelaide who did bent trials a few years back and also someone who used to work at Grange (both use predominantly couch. However both were encouraging and seemed to think that in a run of hot weather it might need 5 - 10 minutes each morning in addition to a weekly soaking. The main issue is the shallow root system but they all seem to think that because Adelaide doesn't get the regular humidity of some of the northern states that a creeping bent will work just fine. I also spoke to a guy in New Zealand who is in charge of all bentgrass for Advanced Seed who was nice enough to call me after a number of emails I sent and his only concern was that I wouldn't mow it regularly enough. He said that so keep it at it's best it'll need to be mowed up to twice a week. When I told him I mow the crappy kikuyu council strip at the front of my house twice a week he said that he couldn't see a problem then