Not sure if Bundy is going to benefit from any mining in the short to medium term, if that's your reason for investing then I would look to Toowoomba as a better prospect. But if you like Bundaberg then the following areas are good:
Branyan
Avoca
Kepnock Heights
Some parts of Bundaberg West
Areas to avoid:
Thabeban
Svensson Heights
East Bundaberg
North Bundaberg (all of it)