Brushless Motor and esc setup

[kfcaddict]

Hi, just got a ZX-5 and I was wondering what setup would be the best for the Bury and Batley tracks I was thinking about getting a Mamba Max ESC and waiting until after April to get a brushless sintered motor possibly from Novak or just get hold of a 6.5 GTB and use it with the Mamba now. Also I was wondering what pinion gear would be best to use with the setup. Any advise? Thanks.