titanx vs quadro vs Tesla?

Im discovering the limits of outdoor longer range architectural ue4 has. however my issues appears to be gpu based. ram and cpu are only around 30 - 40% but the frame rate drops to about 5 fps when the camera turns to the long view. i have x2 980gtx (though i have read that ue4 will only be using a single card). everything has been converted to static mesh from bsp and unfortunatly i have been forced to use all realtime lighting (1st project and ****ed up something somewhere that crashes editor towards the end of the light compile usually about 5 or 6 hours into it).
My question is:
Will i get more power in ue4 from investing in a quadro card over a titanx card and if so how much more power? links to performance stats etc… would be great as well.
Or will a Tesla card serve my requirements better?

The tesla is a gpu compute card, not a game card, so that can be pretty discounted for this. Lightmap baking is all done on the CPU so the tesla is no use there either.

If you have a lot of objects then that’s why the far away views are bad, if that’s the case then you need to consider how to lower the number of objects and materials.