Stainless steel is more weather resistant then blued steel. Takes alot more before it will rust, usually. Of the two guns listed, hands down, take the Xbolt. Great trigger, nice short bolt lift, and at least my wife's, its accurate.
Now I'll offer my opinion of what you listed. The price for a composite Xbolt blued, should be much less. My wife's Xbolt hunter(wood stock, blued barrel) in 300 win, was $750. I want to say you can find them in the $600's range. May get a better deal at a gunshop. Your scope, IMO, overkill. You dont need a 50mm scope for only 3-9x. Extra weight, requires higher mounting, affecting cheek placement, etc. For $399 you can get a Zeiss 3-9x 40mm, and it will be hands down better then a VXII. So see if you can get a better price on the gun, and Id consider a different scope.