Although the 8528IKWS is indeed half ton towable, most half tons would be maxed out. I think you are making a wise decision looking for a 3/4 ton. The Ford 6.2 liter engine would do fine, but in a few years you might want a larger trailer or possibly a fiver. In that case, the diesel would be needed. The Ford 6.7 diesel is turning out to be a really strong and reliable engine.
My 2 c
2016 Ford F-350 Lariat CC, 4x4 SRW. B&W turnover with extender. 2015 CC Silverback 29RE, fitted with Reese Goose Box. Amateur Extra Class K5TS, 2016 nights camped 16