The setting up of WHS is easy enough for a novice? Do you have to set up all the domain logins etc..
And is the RAID function in WHS good compared to Unraid? (aiming for a RAID 5 setup) I quite like the ease that you can add extra capacity into Unraid (from what I read on here)
Theres no easy answer as to whats best for your needs. Theres pro's and con's to each os. The reason I chose unraid is because it allows you to use hard drives of different sizes, you can remove an old drive and replace it with a bigger drive any time you wish and not have to worry about losing data.
Theres also redundancy in the sense that you can set one drive as what is called a 'parity drive'. This is one drive that is set aside for redundancy, if you lose one drive your data is intact, just insert a new one and the array is restored. If you lose two or more drives at the same time, then you only lose the data on those drives and the other drives will still have their data intact. In a normal raid array if you lost two drives then the whole array would be inaccessible and all data would be lost. I would hate to lose all of my rips like that and my data is very valuable to me, hence why I went with unraid. Its taken me a long time to rip all of my 200 blurays and I would hate the thought of having to rip them all over again. that would probably take me near a week solid which is time I cant spare.
Unraid will also spin up individual drives when accessing your data with no need to spin up the whole array of drives, obviously this saves on energy and wear and tear on the drives themselves. Unraid is also placed on a usb stick which again means no need for a harddrive to spin up for access to the os.
Here is a summary of unraid from their wiki:-
No striping, so safer for multiple drive failures; parity protection, so resistant to single drive failure; flexible, can mix and match drive brands, sizes, and types, easily add additional drives, etc...
Each drive is an independent file system. An unRAID array can be thought of as a parity protected JBOD. If the array fails, the individual drives are still accessible, unlike traditional RAID arrays. Spin down can be controlled per drive, so a drive with rarely accessed files may stay off (spun down) for months, saving power costs, and possibly increasing its life. With standard striped RAID arrays, the entire array must be spun up or down, so generally stays spun up.