I have a 2011 f-150 supercab ecoboost that I pull our 34'5" 30WIKSS with. At least I have it until Friday. That's when I pick up my F-250 6.2L SuperCab FX4.
I love the Ecoboost. It truly is the EcoBeast that everybody talks about. It has no problem at all pulling the 8000# (loaded) travel trailer. It manages long inclines and hills with no problem. It runs at low RPM's and maintains speed with ease.
Now, what the f-150 does not have.
No matter what you do, you'll always have to manage what you put in your camper and especially what you put in the bed of the truck. The frame will always be an F-150 frame (1/2 ton). The payload will always be at least 1,500 pounds less than the F-250. The Ecoboost no matter how cool, will always be at least 1,000 pounds lighter than the F-250, meaning those 18 wheelers you meet on your way to the campground will move you across your lane, even if you don't have lane to move in.
The money to purchase a well equipped (read max-tow, max payload) F-150 Ecoboost will be VERY close to the money you'll pay for the F-250. The F-250 (2013) I just purchased with more options than my F-150 (2011) only cost $2500 more. (the 4 wheel drive on the 2013 which the ecoboost does not have).
Ask your employer if they have access to the X-plan. It really does save you money. That, or negotiate your butt off. I simply prefer both.
Really, if your budget can accommodate either, I can see no reason to even consider the Ecoboost. It's still an F-150. The cool factor carrys with it brakes that are smaller, (once the ecobeast gets you and the family soaring down the highway at 60 or 65 MPH with 7500# attached stopping can sometimes be more important that acceleration ability and/or the cool factor)
I LOVE my Ecoboost. I love my Bride and my life more.
I know I'll love the capacity, safety and appearance of my new 250. Oh yeah, F-250's are cool too!