Go with what feels right in your hands...
I think that you have a solid plan inplace. Get a quality rifle this year next year buy a new quality scope for it. If you have the 1000.xx to spend you could get both this year. A good scope will cost around 150-200 dollars. A high qualitity rifle will cost around 600-650. Very good entry level models start at around 300.
You already like the Rem SPS stainless M700, that is a very nice rifle and the 308 Win is a sound calibre. There really is no difference to the animal at normal ranges whether you use the 270 Win, 280 Rem, 308 Win, or 30-06. Some will argue why one is better than others but from 0-200 yards they all perform stellar. The short action choices like the 308 Win or 7mm-08 will be placed in a shorter action (1/2 inch). The short actions usually weigh about 1/4# less.
I would go to a gunshop with a large selection of different Manufactures of bolt action rifles. It will be easy to have 1/2 dozen different rifles to choose from that are at the same price point.
Try to get it down to 2 or 3 choices then go online and do your homework. Finally take the one that you want to have at you side for the rest of your life. In the end you will make the right choice.