so, i just got our new n8800 (bought at buy.com for 1449.99US$) and because money is tight and i'm not ready to fully trust 1.5tb drives... i setup our n8800 in RAID6 with 8 Seagate ST31000340NS drives with 128kb stripe size and the ZFS file system.
i started around 11:30am PST and its wsaid roughly 400 min to build/format
i don't forsee any problems as these are the enterprise drives and are built for this setup.
i'll post more when i've started xfering files