25 fps will give a quite the headache over a short period of time. Just hope you're not prone to seizures.
As far as LFS needing eye candy, I fully agree. Life is full of eye candy, so should be a sim. By this I don't mean tunnel vision at speed, blur effects and such. I mean balanced lightning, dust, light effects, etc. However, it's not the ver. of DX thats the problem. It's the devs not doing anything about it/with it.