No one can really tell you what you need to buy. There are pros and cons to all types of RV's and frankly you are comparing apples to oranges.
Is there a reason you skipped over class C's? Frankly I find it odd that B's are smaller and more difficult to camp in long term but are just as pricey as a class A.
A's are easier to drive than you think, possibly easier than a B and for me definitely better than a C.
You need to decide what you want based on how you will use it. Will you be using it to get groceries, or camp and travel long distances sit for a while.
Drive both, rent both if you can, and realistically think about what you will be doing with it. How YOU will use it should drive your decision, not opinions.
