kikaha said..
I have paddled both the 29" and 30". The 29" has more rocker less volume nice for down winding less so for flat water.

I weigh in just under 90kg and found the 30" way more board than I needed. I didnt like the recessed deck but did feel it had better flat water
qualities than the 29" (less rocker and a cutting nose)

If your a bigger bloke on flat water or choppy stuff go for the 30", If you enjoy downwinding and choppy stuff go the 29"

But this is just my opinion. Either board your getting great value for your money.