Bit late but here are my 2c worth, I have an R8 Success (timber stock) with standard 17mm barrel contour. It's lighter than a SAKO 75 (timber) sporter in 270w and lighter than a CZ557FS 6.5x55, heavier than my Mauser M12 Expert 30-06, definitely is not a light weight plastic Tikka T3x. It also shoots like a heavier rifle which is a good thing, with exceptional versatility I don't mind the weight, and it settles on the sticks really well.
I have 22-250, 6.5x55, 30-06 and 9.3x62 barrels, 22-250 is the heaviest with the smallest bore whilst 9.3x62 is the lightest and you would not want any lighter, all barrels shoot great, clean very easy and show no tight spots.
Detractors -
1. The R8 action is a bulkier then my R93 which I believe to be a slicker, faster action if speed is your thing.
2. Typical European rifle with very long LOP at 14.5", I am a short arse at 171cm so I have all stocks shortened to between 13.75" and 14".
3. Twist rates are slow in most calibers and will not stabilise the latest high BC bullets, especially heavier mono-metal Barnes etc. which can be practical here in Oz's open landscape. 30cal 1:11T as opposed to the usual 1:10T, same in the Mauser, Sauer, Tikka and Sako although this may change.
4. You look like a sexy bastard at the range
Cost here in Australia, Blaser R8 Success (grade 4 walnut with ebony tip) with four barrels $14500, Zeiss Victory HT (x3), Zeiss Conquest V4 (x1) and Aimpoint H2 (x1) optics and Blaser mounts $14500, attache case, bag and sling $1250. If I where to invest into four higher end Sako rifles with the same optics it would cost pretty much the same, shoot no better or worse, would not travel near as well as the Blaser and be four rifles on licence not one.
I really like my R8 and would do it again, I sold a lot of rifles I wasn't using and the R8 is my go to rifle now for hunting. I have considered buying a R8 Professional to give me a wet weather option utilising my barrels and optics, while selling some other rifles I don't seem to use now I have the R8.
Cheer
John