That unit has a GVWR of 8580 lbs so a 10k hitch with 1000lb bars should be perfect. I also use a Blue Ox and have for 3 years and over 12,000 miles with nary an issue with sway and we have towed in some pretty good side winds. I had a DUal Cam prior and it worked good as well so I think the choice is really yours. You may also want to consider the Anderson hitch as it seems to be getting some good preliminary reviews on here and the Airstream guys for the most part seem to like it.
John & Deb
2011 F250 Lariat FX4 Crew Cab 6.2
2011 Flagstaff V-Lite 30WRLS
Days Camped 2013: 16 2014: 5 2015: 3