From experience, Rega (Ara, now RS1) and Ascend Acoustics (Sierra 1) were the best stand mounted speakers for near to rear wall placement. The Sierras can also be placed on their sides with no ill effect. I have also have a pair of Opera floor standers (Platea) that do very well with near to rear wall placement. To go one step further, Totem (Mites), Wharefedale (Diamond 9.1), and Spendor (SA1) did not sound special when placed in a similar manner.
Rich