Not sure your going to find a best oil, but if you get any high quality injector safe oil you will be all right. FRom the list you have above, Ive used Motul oil in an injector system with good results. Ive also used Silkolene, Motul and Castrol for pre-mix with good results.

Go with what you can get and get the best quality you can find and you can't go wrong. Just remember to make sure it says that its for injector systems if you are in fact going to run it in your oil tank for the injectors.