I have never owned a Sako but have drooled over many. They feel good, look good, and from everything I have read on them, Sako builds rifles that shoot. I think you made a good choice in the rifle. Both were good candidates though.
I love the 30-06 and it is one fantastic cartridge that will do everything that you want it to. Buy some factory 165 gr. Accubonds or Partitions and you will be set! Now my son (15) has purchased a 300 WSM in the EW-SS and he loves it. I like it too! I'm still fine tuning the perfect load for it, but it appears as if it's going to be a shooter. The recoil feels about like shooting my 30-06 by the way. Can't really tell much difference.
You will like either chambering and just go with what feels right for you. They both are great.
David
