RE: looking for 270 for first deer gun
With this being your first deer rifle and shototing deer out to 200 yards I would highly reccomend sticking with the regular .270 Win. It will do absolutely anything you would want it to do on deer size animals and do it for about 1/4th the cost of the 270WSM. The savings would allow you to thoot the rifle much more and get some good practice.
Other good suggestions would be any of the cartridges based on the 308. Such as the 308 itself, 7mm-08, & 243