Heartland- Bought a new 34' Heartland a would not hesitate to by a new Heartland. I would suggest:
1. "G" rated Good Year G614 tires before you drive it off the lot, your dealer can swap the original tires for the G614's at the factory.
2. 2 canister water filter system
3. If the new Heartland has those little circle shaped white frosted lights all over the ceilings, find some cheap replacement bulbs and always carry extras. Call Heartland tech support and have them explain how to replace them. Until you figure out how to do it they can be difficult. Pull the whole light unit down about 2" and try not to pull the light completely out, then grab the metal case
in one hand and then the glass cover and turn until the glass comes off.
4. change the fifth wheel hitch to one that has air shocks that can be adjusted with an air hose.
5. Measure and find the center of your back window. Now take a bright colored thin strip of tape and attach it to the inside of your rear window. When backing up to hook up your 5th wheel just line up your tape with the center of the hitch. makes the job easier.
6 Not a big fan of "Extended Warranties" costly and frequently to many fine print "exceptions".
7. replace the original water pump with the newer type pumps(Shure) that have variable speed as they are %80 quieter and and provide instant even water pressure.
8. Hook that new rig up and enjoy your RVing:)