Montmorency is the most popular sour cherry variety for pies and preserves. I hand pit the cherries, which produce so much juice it looks like a scene from the opening credits of "Dexter!" If someone has a good cherry pitting tool, please let me know - I expect my harvest will grow in future years, so it will be worth investing in one. Once pitted, I either freeze the cherries in zipper pint bags, or use them fresh on granola or in smoothies. For a little sweetness, I use a combo of my own stevia extract (made from organic stevia leaves I grow) with a touch of maple syrup… wonderful mixed into Greek yogurt, our used in a pie. Cherries are high in nutrients and particularly good for sufferers of gout.
I've read recently about a cherry shrub called Nanking cherry, which I'm tempted to buy and plant. I've only found them online, not at any nurseries. If you are interested in sharing an order with me, just let me know!