We bought our 243RBS last March. During this month, the area RV Dealers all have an open house with prices "slashed'to a respectable level. So that's a toss-up.
The F150 Eco Boost will be a beast on towing this trailer. I'm going to upgrade my TV at the first of the year. I am leaning towards an F250 6.7, or maybe even the F350. The only reason is that I will be buying used and the price difference between the diesel and the eco boost is negligible. I just really like the big trucks.
That said, I've never owned one, so my opinion could change.