Thanks for the responses.
By the sounds of it, my Dad will enjoy those lower rooms just fine. I just have to find out if he prefers to have a small porthole to look out or a larger room at the back of the boat.
My biggest concern had been the noise down there, but it sounds like the 1st floor rooms aren't as bad as you think they'd be....and my Dad is a heavy sleeper anyways.
If anyone has been on the Victory, I'd love to hear about 1A rooms that you've stayed in.