Sounds almost exactly like mine, down to the graphics card + NV5. :) Just fyi the X1 is the business version of the 4800 though. The 4805 and 4800 have different DMD chips and resolutions. My setup is Levels > denoise3d+HQ > Lanczos4 > output YV12. I use Lanczos4, I swear the Spline can look...
Excellent advice Jesse! Can I ask what kind of display you're working with? I'm on a modest infocus 4805 and even though the native resolution is 854x480 I see a huge improvement in scaling to 1440x960. Will- it looks like you have enough power. The big hit on the CPU is Lanczos or Spline...