I decided that I am going to purchase the 4429's. In addition to advise given here, I also reached out
and had a couple of people from Harman and one from McIntosh tell me the 4429's and MC275 will be a good combo for home use. That is not without a point worth mentioning. One rep pointed out, the 4429's would not reach their full potential but still play loud.
Updates to follow.