40 or 42? Pros and Cons

A new Tiffin 42 foot Class A motorhome is financially out of our reach, but a used one (2007 or later) may be a possibility.
We thought a 40' length was right for us, but we saw some 42' models we may be able to afford.

So what's the difference? Why would we get a 42' instead of a 40'? What are the Pros and Cons?

42' Pros

• Stability of the ride (especially in cross-winds and when tractor/trailers pass) is improved
  
• Easier and a better drive than the 40'
• Tag axle makes turns easier, almost impossible to overload
  
• More interior living space and interior storage
  
• Weight distribution on chassis is better
• Hydra Hot (unlimited hot water) is standard equipment
• 10,00 generator is standard equipment
• Quite a few 40' owners who got a 42' wish they had started with a 42'
• Even though the hitch is still limited to 10,000 pounds, (1,000 tongue weight), you can tow anything there without having to worry about overloading the axle.
  
• Three ducted AC units have 33% more cooling capacity over the 40'
  
• Three AC units help with redundancy in case one of the ACs go down
  

42' Cons

• Price: could be $30,000 (or more) for the same 40' model
• Heavier and larger than a 40'
• Gas mileage not as good
  
• Less access to RV spaces in older state parks and campgrounds
• Higher maintenance costs with extra set of tires, maintanence, wiring, air pressure systems, etc
• Possibly less storage space underneath
• Because of the tag axle lever-effect, some weight is transferred to the front axle, therefore getting the front axle close to it weight limit.
• May need to have larger tires
• More expensive tolls, (may have to pay for the extra axle)
  

We have some time but it's something to think about.