Either will be good, but a 7-08 shooting 120s or less is a 243 for all intents and purposes, including recoil. I'd go with a 7-08 because it is more flexible in reloading for game. It will go down to 100gr bullets and shoot up to about the 168 grainers. If you don't care about more flexibility, the 243 will do the job.
+1. Mine (and it seems a lot of them) really shoots the 120 NBTs well.
