What Game Engine To Use

I have been playing around with game development on and off for a while.  I always have the minimum requirement for the engine to run on Linux.  I have this requirement because I run Ubuntu on my best desktop computer in the house which has a Radeon 7770 for video and has a 6 core AMD Phenom II.  This setup plays all Steam games fairly well at 1600x900.  There is even greater reason to pick an engine with Linux support because the new Steam Machine game consoles basically have game support through Linux support.  Graphics are also important to me because I love things that look beautiful.  If you are a pro game developer that wants the greatest graphics for your AAA game you are going to have to:

    A)  Pay for an engine that supports the best graphics possible.
    B)  Build your own in-house game engine with what you want.
    C)  Take an Open-Source game engine and add the latest graphics support.  (Tesseract)

If you go with option A your best options are Unity, Unreal Engine 4, or Cryengine. 
These all can run your developed game on Linux and they have pay versions that support the latest in OpenGL graphics technologies.  Unity runs $1500 per seat for a pro license.  Unreal Engine has always had a reputation for being cheaper for small projects by charging a smaller monthly fee.  And now for the first time ever Cryengine is pulling an Epic by charging a super small monthly fee of $9.90 a month which is beating Epic Games price for Unreal Engine 4!  The new EasS (Engine as a service) pricing is staring May of this year.  So Cryengine is looking like the best option for now, see the video below.  Lets not forget about Valves Source 2 Engine which will be coming out soon it might out-do even Cryengine since the Source Engine right now is free and its possible to make free contributions to its source code.