Chris, your selection will be on the way Monday, July 16 - pray for a bit of coolness so they can get established. Even some of these normally reliable plants are flagging with all the heat. I can't wait to see more of your projects, especially the rock wall. Here's a picture of mine:
The Sempervivum do exceptionally well plugged into crannies and nooks between the rocks vertically, and the Sedum is gradually filling in and maybe it will drape over the wall some day. Every year, it just keeps getting better.