I just picked up a model 70 .300 WSM.. Accuracy is very impressive.. Have or have had most of the popular .300's. Also shot the .30-06 for 10 years.. Still have two .30-06's and seldom shoot either.. I would pick the .300 WSM, because I like shooting and different rifles.. IF you are just a casual hunter I would go with the .30-06. For myself, I DO see a difference in the between the .300's and 06.. Especially as ranges lengthen..
If you are shooting whitetails from a tree stand or over bait.. Either would be fine.. Probably the 06 would be more practical there..
