OP said: "Seems the go to for the most of everything was a diesel pusher in past, but maybe not any more, and wonder if I intend to stay on East Coast and out of mountains, would a gasser with new Ford V8 be a reasonable option? I am a senior, single and no pets. I have pulled a car on a dolly and with my arthritis that was very hard on me to hook it up and unhook, so know I need a better solution for toad. Seems the ideal would be a 400hp+ diesel pusher. Newmar would be my first choice particularly since I'm focusing on used rigs. The DP turned me off because it was not in good shape and was a real slug, I think a 300-330hp model and had very poor acceleration."
In reading your posts I think most DP's compared to your 27 ft A would be real slugs. Remember your A was 1/2 the weight and more HP than the DP's you tested. If you plan to stay on the east coast you don't need a 400 hp Super C or DP. With arthritis towing flat is a lot easier than a dolly on you hands and knees. I would defiantly look at the newer 7.3 V8 engines in a 32-35 ft Newmar if that is your first choice, there are suppose to be a lot of chassis improvements in the new 7.3 eng chassis combo also for a better ride. Look for a better WB/l ratio over your 27 ft A. You can add always extra insulation to the dog house if needed. There is no perfect MH everything is a compromise based on your particular situation. Hope this helps with your decision.