I'm finally ready to make the move from FreeNAS to Amahi over the weekend.

Tonight I'll be extracting the data from my existing ZFS array and dropping it onto a couple of spare 2TB drive I have. Then I'll go ahead with the installation tomorrow. I was thinking that the below config would make sense, just wanted to run it by you guys to check it did make sense...
4 x 2TB drives in Greyhole pool
1 x 250GB drive, partitioned as 10, 40, 200GB - 10 for swap, 40 for OS/Root etc and 200 for LZ.
Any benefits to doing this another way?
You input is appreciated,
Cheers,