I had seen Dyckia 'Nickel Silver' at a nursery recently, but the asking price was a bit too steep. Then I discovered it at another nursery...and the price was right.
And I already had a pot that I pictured it sitting in. I really like the way the grey foliage contrasts with the dark brown pot.
Online data indicates that this variety is one of the more freeze-tolerant of the Dyckias, handling temperatures down to the mid-teens. It likes full sun which, of course, it ain't gonna be getting in my garden - but hopefully it will get enough.