If you're going to leave it stock, of your choices, I'd pick the M70, no question. I prefer 3-position safeties and hinged floor plates. Fit and finish on the new M70's I've handled has been great. That said, I don't own one because they're not currently making lefty versions. If you may want to modify it down the road, I'd choose one of the Tikkas for the aftermarket options available. I do have a T1x and it's a nice rifle, but there are definitely a few things that could be improved. The X-Bolts are nice rifles too; I also own one of them. They definitely improved some things from the A-Bolt, but they also cheapened it somewhat in other ways. I don't think that they're an especially good value for the money once you get into the fancier versions. They have effectively no aftermarket, so only consider one if you're never going to want to modify it. I do like that both the Tikka and X-Bolt have lower bolt lift since it makes it easier to mount a scope low.
The Christensen Arms rifles get some very mixed reviews, but I like my Ridgeline. I'd think the Mesa would also be nice and fits in your budget. EuroOptic has some good deals currently. I noticed a Mesa FFT in .308 on their site for $1250 yesterday. The Bergaras are also nice rifles. Since they're both Remington 700 pattern, the sky is the limit for aftermarket on them. I didn't feel the need to change anything on my Ridgeline other than adding a CB brake and a can though.
In the last several years I decided that I also wanted a couple hunting rifles that I could get ammo for at Walmart if necessary. I ditched some of the slightly oddball calibers and went with a 16.5" .308 and a 22" .300WM. Depending on your use, 6.5CM, .270 Win, .308, 7mm RM, or 30-06 would probably be the most available options. I picked .308 because I wanted to go short on the barrel and I think it's the best option of the Walmart calibers for a shorty. 150 yards would be a very long shot where I usually deer hunt and there's some thicker brush, so I chose to keep it as compact as possible. The .300 is mainly for future hunts for larger game.
What features do you want on your new rifle? What are you going to hunt with it? How far are you shooting? Are you planning to use it as a range gun too? More detail on your anticipated uses will help narrow down the best options.