Well, of course I would sway towards AMSOIL

But I'll be fair. If I wasn't an AMSOIL user, it would be Mobil 1. Not a fan of RP. Heard too many negative things, maybe not about the motor oil per say, but others...gear lubes, motorcycle oil, etc. Doesn't mean it's not good.
AMSOIL is a great product. You have 3 grades to choose from, each with different pricing. The OE will take you as far as you manual allows you. The XL line will go 10k or 6 months. The signature series will go 15-25k(depending on condtions) or 1 year.
So depending on what you want out of an oil, one of them should fit most needs. AMSOIL does have a filter for your truck (EaO11). This filter will go 15-25k or one year along with the oil. You don't have to run them. If you use an aftermarket, typically these should work for 7500 miles or so and will work fine for the OE or XL. If using with the sig. series, you would need to change it every 7500.
Be glad to get you some prices if you wish. Let me know which grade and how much. Prices are competitive to others even with shipping. Don't go by the website pricing.
Appreciate you asking.
Heath