Kingsgrove is an excellent store to purchase cricket gear from. They have opened several outlets around the Sydney region.
I rate Gunn and Moore's Puma's, and Kookaburra's highly as opposed to Indian bat's where the weight is soundly in the toe, the afore mentioned bats I believe are bats of greater balance. However, there are several good value bats out there made by smaller companies such as Hunts, and Impala just to name two. I would tend to steer clear of those graphite handled bats as they seem to have a propensity to crack and break, noted from experiences.
As zingerburger mentioned, it depends greatly on your budget. Also, think about how much longer you intend to play cricket, no point buying a $450 bat and only play for a season.