All four firearm companies you listed make great rifles. Go to a gun shop and look at them. Give them a test fit and see what you like. As far as what cartridge to get... I use a 270wsm on deer and elk and wouldnt think twice about using it on a moose. That being said you cant go wrong with any of the ones you listed. The short mags will generally be lighter, less barrel and a short action. They can all be made to be very accurate. Pick which one you think sounds the most interesting. They will all do the same job.