BirdingRVer,
I had the same questions, I am a first time 5th Wheeler myself. After speaking to many people and reading about it, I elected to go with the Husky Airbox, it is said to take the jolt, and offer better control as well as ride.
I got the EZ Roller slide as I have a short bed in my Ford.
I have the dual air bags, Firestone, I think. I asked about the shock and bag on the goose neck, and opted to go with the Airbox.
You will get many different opinions, which is good, based on area availability of any brand name, as well as which one the selling dealer stocks.
I will let you know in a Month or Two how it works for me.
Good luck.
Ozz
'07 3400RL 2nd RTU
2 Golf Cart batteries 3,000 watt inverter, automatic transfer switch
Honda 2000 Generator, 2nd one and twinning kit coming
Maytag's with 220 Dryer
Stationary domed Sat. dish
LCD 12 Volt Amp gauge
LCD Tank Monitor
3 added 120 volt outlets
On Board Air; 12 Volt Viair 450C compressor
2006 Ford PSD 4x4 Off Road Lariat
Hadley Air Horns
Truck inverter with 110 volts for laptop
Color Backup Camera
Awning lock