Went through this debate with myself a couple years ago (add in a model 70 fwt), ended up getting a SS mtn rifle. The mtn rifle stock and floorplate (vs detach mag) were the main points that tipped the scale vs the Tikka. I could have lived with the "plastic" parts of the Tikka, though neither are what I consider "fine" rifles. I consider the Tikkas somewhat overpriced for what they are (approx. 900 for a stainless) and the last jump in mtn rifle prices (over 1100 up here now) has me shaking my head.
My mtn rifle shoots 130 ballistic tips and interlocks well (270), I have not tried other bullet weights yet.
The three rifles were within $100 of each other at the time.