Good choice. I have a 788 in 6 mm Remington that I got when I was in university in the mid-70s. It is not for sale.
With the right handloads, it will shoot 0.5 MOA all day.
A couple of things:
The finish that Remington put on the stock of mine went soft and you could scrape it off with a fingernail. So, I removed the stock and put about 8 coats of Birchwood Casey Tru-Oil on it. While the rifle was out of the stock, I relieved the barrel channel to float the barrel and sanded off some of the sharp corners on the pistol grip. It looks a lot better, and floating the barrel did help.
My magazine rattles a bit as well. However, since buck horns rattle while they are fighting, I have never worried about it. Putting any additional pressure on the receiver (as in Duct tape) may make the accuracy in consistent.
While the rear locking lugs and fast lock time help the accuracy, the action is not as strong as the Remington Model 7/700 actions. Factory loads should be fine, and the quality of the factory ammo today is very high. BUT, If you plan to handload, I suggest you start low and work up to the maximum slowly. I found this out the hard way while using some Ken Water's load information (If he said it was maximum, it was) and had to hammer the bolt handle open after a primer let go. The good news is that the gas porting works. However, seeing smoke come out of the action will get your attention.
If the scope is mounted low, it is possible that the ejected cases will hit the windage adjustment knob cover. Check the scope mount knob cover for little dings to see if this has happened. This is easily solved with higher scope mounts.
Enjoy. You got a very good deal.