I can't help you with the stock since I haven't looked into options yet.
The scope is entirely up to you and really depends on what you're going to use the rifle for, what features you want, and what you can afford.
The rings need to both keep the scope off the barrel, and position the scope so that when you take a natural cheek weld, your sight picture is usable. I've heard the best way to position a scope is to close your eyes, shoulder the rifle, and then open your eyes. The scope should be positioned so that you can open your eyes and have a good sight picture without having to move your head around. Whether that will require low, medium, high, or even extra high rings depends on that sight picture and the need to keep the scope's objective lens off the barrel.