Hi Jan.
Planting them so the eyes are 2 inches below the soil is the proper depth for your area. Dig a very large hole. I mix in quite a bit of compost in with the soil and make sure you have a place with good drainage, water in well after planting. Do not plant too deep, they will not grow and bloom if you do. The peonies coming from Don Hollingsworth's Nursery usually bloom for me the first year after planting. They are the best root stock around.
The choices you made are great too. You should have some great looking peonies in years to come. Just remember to give them room to fill in, they will improve every year and get larger and more blooms. They are patience plants, but just you wait, in a few years they will truly knock your socks off.
You'll have to show us pictures next spring when they come up. You have chosen some of my very favorite peonies