Personally I recommend Mobil 1 and either a PureOne, Delco, or K&N oil filter.
A secondary excellent oil is Pennzoil Platinum. Just about equal to Mobil 1, but I still trust M1 more, and have heard more good things about it.
I don't recommend Amsoil, I read a very comprehensive long term test on it, showing that it actually gets thicker over time, and to the best of my knowledge, these engines don't like thick oil. But if you want to pay for it, more power to yah.
And as far as Royal Purple goes, it is basically the biggest waste of money for a daily driver. Unless your engine is used strictly for racing...but personally, I wouldn't even use it then, I'd STILL use M1.
If anyone else has any questions about oil, explore
http://www.bobistheoilguy.com/ . Best informational oil resource on the internet.