RE: which 300?
If you dont reload, the 300win mag is the ticket, great power, cheap and plentiful ammo. If you handload take your pick, although I think that the 300RUM is a better choice than the 300weatherby because of cheaper ammo w/ pretty much the same performance. As for the 06 doing ANYTHING that the magnums will... ask yourself if you want me to drill you w/ a baseball(50mph) or randy johnson(100+mph), after all its thesame ball just a little faster.