Can I get an honest opinion on whether to get one of these little servers or just buy an off the shelf NAS?
Having used 'off the shelf' Thecus, WD, Drobo, StarTech, and a few others, my little N36L is the mutts nutts in comparison:
It's cheaper off the bat. The bare box can be got for half the price of the dedicated NAS boxes if you wait for the rebates.
It's faster. A lot of the problems I saw years ago was that the sticker might say 100Meg connectivity, or even 1Gig, but the on-board CPU wasn't fast enough to deal with that much traffic so you'd still be limited to 8MB/sec, or slower. My slower, older N36L will give me 40MB/sec+ without breaking a sweat, and sometimes 60MB+ if I'm not messing around.
It's more flexible. Brand X NAS box ties you to Brand Xs implementation of RAID5/6. When the box dies, off you go to buy another one, or find recovery software that will do the job (ignoring the obvious backup that you should have there). With the Proliant, if you want FreeNAS, drop it on a stick and off you go. If you want software RAID, get yourself MS Server for cheap/free or whatever version of Linux floats your boat and off you go. If you want exotic, but wonderful software RAID, get yourself anything that supports ZFS. If you want big, brutal, ballsy full hardware RAID, get yourself the controller of your choice and drop it in. Whatever variety of RAID you want, you are covered.
It's bigger. A 2-drive NAS will always be a 2-drive NAS, same for 4. These puppies have 4x bays at front. But then you can get a sled or bracket and fit another two in the 5.25" bay. And then if you're a bit McGuyverish about it, you can slip at least one 2.5" drive in above those, possibly two if you find a slightly longer cable! (The clearance is there, I've just not done two). Now that's expandability.
In short, other than your own technical limitations or the need to save as many inches on the box itself as possible, I can't think of a decent reason to stick with a NAS.
Of course, YMMV
