Yep, here we go again, another oil thread. This should be good
In my own opinion modern oils are so good that there isn't much to choose between them.
I've used Castrol for years, Amsoil for years and Motul for years. All with excellent results.
I'm mainly using Motul now as it's easily available in 4L quantities from a Canadian online supplier with free shipping right to my door in a couple of days.