$150 for the pair is a steal. I paid $100 for an Eddystone action alone.
I have a Win '17 Enfield in 375 H&H AI and am completing an Eddystone in 300 RUM.
IMO go with a big cal as the action is big and strong. If you want a 243/308 trade your action for a Mauser action. A Yugo 98 would be best for a short round like a 243 or 250-3000.
