Pi2+iC880A-SPI = LOVE
Probably the best value at the time of writing this, this combination (Raspberry Pi plus IMST iC880A-SPI) is both easy to setup and reliable.
We all owe this mainly to the group led by Gonzalo Casas in Zuerich, who maintains also the GitHub repo for the installer of this DIY gateway.
So, this was the obvious choice for my own DIY gateway, now up and running.
Thanks Gonzalo!