Wanting to get a new Tikka rifle this year.

I primarily hunt east side Muleys. Been thinking about the 300WSM. Is this too much or would I be better off with say the 270 WSM?

Suggestions on optics to match would be helpful too. Would like a package that could reach out and touch something up to 300 yards or so. There a lot of opportunities to do that out in the wide open sage and wheat fields that I don't always take with the old '06 with the 3x9 because I just don't feel comfortable with the shot.

And lastly...anybody have a gently "like new" used one up for sale?

Thanks,
Shane