Just a query ... what's wrong with using the Insert command's Rotate option? It's not going to be a spacebar or so, but pressing R<space>90<space> wouldn't be too bad, as you could add those as a macro keyboard shortcut.
The problem with the grread is that OSnaps don't work as usual. You could "make" them work, but the tool tips won't show, neither would the aperture if you have that set.