That's one route to take and definitely cheaper. I had Talley rings on my Howa 1500 but they weren't 20moa. That was when I ran out of elevation. A 20moa pic base and regular rings is an option. The Nightforce 1 piece is nice too.If you're looking at mounting a picatinny base and then rings, I would recommend rings direct to your receiver. I use the Talley rings on my Bergara and have found them to be fantastic. They have 20 MOA options as well. It's also a lot nicer on your wallet.
make sure to measure the height of the base or rings along with your objective sizes. I prefer my scope to be a low to the bore as possible.