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While my long time absolute and unrivaled favourite perennial Salvia has been
Salvia nemorosa ‘Caradonna’ I had to have ‘Rhapsody in Blue’ when I saw it today. It lacks the dark purple stems of ‘Caradonna’ but has absolutely massive (for the species, anyway) flowers in a nice blue colour.

Salvia nemorosa ‘Rhapsody in Blue’
I expect (and hope for) similar performance to ‘Caradonna’ - low maintenance, low water needs, long flowering time (including a second round of flowering in the fall).
I also picked up a few more
Sedum species (I might have a problem).

Sedum pachyclados

Sedum hispanicum var. minus 'Blue Carpet'
The first of these (
Sedum pachyclados) forms attractive rosettes with white flowers in spring and again later in the summer.
The second (
Sedum hispanicum var.
minus 'Blue Carpet') forms a low mound of blue-green leaves with white or pale pink flowers. Seems to have a purple/pink winter colour as well.
One of these Sedum will be going between/around a
Hosta 'June' and the
Salvia above where it will also be allowed to spill out onto the patio.