Different manufacturers offering the NUC
This should mean lower prices, with different OEMs putting together their own competitive NUC solutions. Anandtech reviews the NUC Gigabyte offerings.
They all should be plug and play with Webconverger.
The cheapest NUC?
We've heard excellent reports of the Intel DN2820FYKH from customers. They are well made and use the cheaper Celeron based processor. These are going for less than 200USD!
Also do compare the Recommended Customer Price at the Intel ARK.