Thanks for the replies. As long as the price for RAM on this beast isn't insane I plan on upgrading it to at LEAST 8GB. MY current NAS is running OpenFiler and only has 2GB of RAM and it runs great.
That's what I plan on doing if nobody has done it already. Figured I might as well not waste my time if someone has tried it already and the answer is "no".
I don't mind being the guinea pig.