Phantom Gardener in Rhinebeck
I took my first trip to the Phantom Gardener nursery in Rhinebeck. They are an upscale place. Their indoor stuff looks like a NYC department store. Very classy. And very expensive. Just over the bridge on 'my' side of the river, Adams has some of the same plants for much less.
BUT, the selection is amazing. They have unique plants that I couldn't resist, and ended up spending $50 on a few things like opuntia cactus and a huge blue flowered salvia, among other things I've been lusting for. They have row after row of any perennial you could ask for (not every cultivar, though) and a greenhouse full of unusual annuals that look like they were fed growth hormones.
It was worth the visit. I didn't even look at the millions of flowering shrubs, which I have given up on because of deer.