Pretty much any factory target rifle will get the job done. I chose the Rem700 5r because I knew I'd want to upgrade, and the 700 has the most aftermarket support. The 5r is an awesome shooter right out of the box.
My first bolt gun was an SPS Tactical in .223, it was/is a perfect 600 yard gun.
I bought my .308 at Wanstalls for $1099 and my .223 was <$700 from WSS.