Personaly i would go the NSR12S3 as brendale is a bit of a horse power track. And even though your track is tight you can always richen the hs needle up if it is too toey for your track. I recently raced at brendale with an older RB concepts X12 engine and found that at a club day it wasnt the far off the fastest guy down the back straight. But in saying that if you are going to race at the QLD's you will not be able to go past the JP.
Cheers Daniel