I've spent some time throwing at Permit in Belize, and I used a 10wt Sage, RPLX and RPLXI. If I were to do it again I would go to a fast 9wt, either XP or RPLXi. The 9wt because it would help save your arm. I always fished 15 day trips and the 10wt killed my arm.
I would also probable line size up one size to be able to power cast quickly with gusty wind conditions and of course have as much backing as I could get! Take extra lines and backing! You can loose a lot of lines if you fish around the coral islands like they have in Southern Belize.