Just to stick to facts:
Linn is working with Roon on endpoint capability. The Linn Klimax DSM has digital inputs, just not USB. It even has HDMI, so if you have your setup in the living room, it can work as a hub for all your digital gear (videogame, cable box, etc.) It has also an analog input, so if you want to ditch the preamp, it can be done.
The new Klimax is an entirely new product. When we picked up Linn last year, we got the Majik and Akurate streamers, but not the old Klimax, as I felt it didn't present good value for money. The new one, on the other hand, we find not only very competitive, but a notch above the other stuff out there (that I've heard of course).
It is also upgradeable, so if/when a new comes out, you won't have to sell your old unit at a loss. You can upgrade for a fraction of the price of the new unit, and even opt to have the guts of your old device put into a plain chassis, so you can end up with 2 products for a fraction of the price of the new one.
The new Klimax uses the new, top of the line AKM chip, see here:
http://www.akm.com/akm/en/product/featured/audiomarketvoices/linn/interview/?link_id=link972
Also, Linn does employ an FPGA for custom filtering, and relies on the chip for just the core functionality. So if eventually people convince them to do DSD (and we can only hope!), it can be done via software.
Linn also offers a form of room correction, called Space Optimization:
Linn — Space Optimisation Explained
Linn has control apps for everything, Mac, PC, Android, iPad, iPhone, etc.
cheers,
alex