Vienna Acoustics and Martin Logan make a killer set of on-walls. I auditioned the Vienna's, and it ruined my on-wall choice, which was either Paradigm Cinema 330 or Monitor Audio R225. Those Vienna's just sounded so much better, but they were out of my budget range. So, I went with floorstanders (PSB), so I could get a fuller sound within my budget.
You might also want to chech Paradigm Millenia Series.
You might also want to chech Paradigm Millenia Series.