I'll add those to my list. The whites I've had my eye on are Echeveria Lola, and Echeveria cante 'White Shadow'. We've had Echeveria 'Black Rose' in the past and loved both the color and the ease of growing it. I have a small one growing in a succulent wreath and it stands out very nicely among all the others. These would all be containerized houseplants that would spend their summers on the front porch or the retaining walls of the raised beds in the front yard. Winters would be indoors.
Another one I would like to see, although green, is Moraea Tortilis (called Curly Grass). I don't know for sure if it is a succulent but it is definitely unusual.
