I spent the last few hours fiddling about with all kinds of settings...and I couldn't come up with any more conveniant ones.
Funnily enough, Wideviewaspect=True reduces my blurries, but costs a few FPS indeed. Yet, FSX is still running smooth.
Note: SPRR is set to default again.
OK so you are smooth and have good scenery, but it's just a blur issue at this point with jets. Well, PTalylor did say that the faster speeds will display this problem. Perhaps it is just a matter of waiting for SP1 now.
On one thought, what zoom levels are you using. I do know this, when testing I keep all the zooms at default because if you zoom back like you do in FS9 the hit to the system is substantially higher in FSX. I keep all exterior views to 100 and the interior zoom at no less than 60% because of that.
So you are using a wide sceen setting for a non wide screen monitor?