I am replacing my larger PSB bookshelfs (B25) and center speaker (C40) with something more amenable to room size (12x12x8) and arrangement.  Basically I need to put things on the wall and current speakers are too heavy.  I have 533-T in my 2 channel, and really like them, so am considering the 422 series speakers for the front soundstage in my home theater room.  Was thinking of a pair of 422-LR and a 422-C mounted on the wall, but is there an advantage to using three 422-Cs?  Do they sound fuller, go lower?   Is there any issue with mounting them vertically as mains?   

Regards,

Adam