I think if its that tough to make a decision then its probably one that doesn't matter all that much....if you really wanted a .300wsm, that would weighon your decision.

I have a .270win and a 300win mag, the 270 id prefer it were a bolt nowadays, but it shoots far too well to sell/trade for a bolt that I cant forsee shooting any better, its one of those guns I don't think I'll ever be able to part ways with. The 300 win mag abolt, as well, shoots very well, have a .340 now that I think has become the new elk rifle,

I think similar to myself, since nothing is really making you want one or the other, wait, give it time, you have what you need for the time being, maybe down the road something well come along that makes the decision much easier.