I was having the same debate in my head, should I get a wsm or saum--my mind was made up because of price, I recently bought 2-- the 7mm ultra mag (sako 75 ss) for 649.00 & Remington 700 300 saum for 459.00.
I believe the sako was a great deal & the remington a good one, In case they were phasing these out -- I pick up 12 boxes of remington 160 gr nosler partitions & 4 boxes of 175 gr partitions for the 7mm & 8 boxes of 180 gr partitions for the 300 saum, that should hold me for a while.