You are referencing the "DPI" F82. DPI is Digital Projection, Inc., they do not manufacture the F82, as noted above, that is a "Projection Design" model (maybe a Barco model, but manufactured by PD), not DPI. I have no experience with any of the PD projectors (including the Barco versions), so cannot comment on where they place in the chain of values (both visually and cost) vis-a-vis the Titan Ref 660 made by DPI. If you want to use only the specs you noted to judge the two projectors, then according to those specs, and assuming you need that light output, the F82 would win. If you want you judge based on the actual image produced on screen, then obviously you either need to find a way to make that happen for yourself, or find someone that has seen both models, unfortunately I have not.
I was very happy with the DPI Titan Ref 660, I liked the light, clarity, color accuracy, uniformity, and 3D support. It was a great projector to my eyes, BUT, I needed to move to 4K, wanted it to be laser, and decided not to wait for a reasonably priced unit from DPI. Having seen the Sony 5000, I decided that would be the next PJ in my setup. You can visit the two main 5000 threads in this sub-forum, all the positive reasons are listed there, it just so many things well. It is an excellent PJ at that price point, one of the best images I've had in my theater. I do however think the Titan handled motion just a little better, and 3D was absolutely better on the Titan (but the Sony is still very good). (I didn't really like 3D until I viewed it on the Titan.)
Sorry, got to leave for an appt., but you get the idea. PM and we can exchange numbers if you are interested in hearing more.