If it were me I wouldn't spend the extra, I am not convinced that the higher grade of bat will play better, and given that AOC gear test had the B3 bats in reverse order from their grading, I would go with the lowest grade. Also since you are there and see your cleft, you should be able to get one you like the look of even if its in a lower grade, just might have some specs of marbling etc.
My view on our grading (or for that matter) anybodies grading whom is transparent with their grades;
1 Stripe - entry level bat, wont look the prettiest, in terms looks but will play well - generally heavier (density)
2 stripe is a great value for money bat
3 stripe will look nice and play superbly
Crown - you know all aout these beasts
I disagree with the AOC test;
Not sure how you can compare bats of different weights, as the heavier the bat, the better the bat will play, so to compare a 3lb bat with a 2lb 10oz bat is not right. In my opinion you need to compare apples with apples and set a weight range for each catergory.
Also, how can you score on pick up, as one mans ferrari will be anothers fiat.....
Streaky