Wire the House A/C or get Power Conditioner?

Power conditioner first;the amount of money involved will be far less than dedicated lines. If whatever problem you think you have is still audible, take the next step. I think it is odd not so long ago "ultra" cables,cleanpower,outlets,power cords, etc. were never a concern. Input, amplification, speakers were it. Once the basics are covered, someone somewhere will tell you about a problem you didn't know you had and offer a solution to your newly revealed system flaw. Spend as much as you want, convince yourself that it makes an audible improvement. Good Luck. I'm spending my money on music.