I am looking forward to buy a reminton 700 with an AICS stock. The problem is, I dont know which remington 700 model I want. I have been looking into the remington 700 p and sps models. What is the difference between those two models besides the stock and barrel length? I know that the sps is way cheaper than the p model but would the p model be in any way better than the sps model if they were put in the AICS stock?