I really like my i5 NUC to run Xprotect on, and I salivate over the idea of the new i7 NUC (I won't be getting one). However, I don't think I'd try to run
Blue Iris on one due to the high resource usage. My NUC with it's 2gb HDD as reviewed by Carl is really completely silent. It's VERY small. Smaller than one of my 8 port Netgear PoE switches. The size has helped me hide it, and the silence and cool running helps it stay hidden.
It uses little electricity, and my electricity costs shed loads during the day on Economy 7. Depends how many years it runs for to determine if I get my money back on saved electricity cost.
The current 2gb 2.5 inch HDD is not really big enough for my 8 cameras, and I have had to compromise on how long I keep recordings for. Hopefully bigger 2.5 inch drives will be out soon. Record to USB drives?...uhm, nope. Network drives (my old Synology)...maybe. I hope bigger drives will be out before I have to go there.
The MJPEG thing depends on camera manufacturer. I know my Sony SNC-DH160 will do 1280*1024 in MJPEG and the newer models will do 1080p in MJPEG. My Lilin LR7022 will do 1080p in MJPEG too. Yes, MJPEG uses a LOT of storage and bandwidth. However, the picture really is that bit better (on my Sony at least).
I wouldn't mind one of the other little boxes mentioned above to play with. I'm sure it would be interesting. Certainly having less HDD constraints would be good. So long as everyone is happy with whatever box/system/software they are using good luck to them. I like reading about everyone's experience with their hardware...even if I think someone is talking crap about a particular issue. o(^.^)o