There's positives and negatives to each....
Plus for a 5ver:
Generally no worry of sway due to the hitch pivot location.
Usually a little easier to maneuver vs a comparable length tt.
Others will chime in also on possibly other positives....
Negatives:
Sometimes the ride isn't as smooth when towing. At least my buddy who has a 5ver, towing with a '13 Ram Mega Cab, seems to get a fair amount of chucking.... His first 5ver, so maybe there is something he could do??? Setup is pretty darn level.
Bed space, or lack of it!!! 5ver hitch takes a fair amount of room. This is definitely one reason my buddy isn't sure he would buy another 5ver.
Truck resale value possibly.... Someone may see the 5ver hitch or at least the holes in the bed and figure the truck was worked hard, even if well within the ratings of the truck.
Possibly payload, again!!! But since you have the gas motor it helps vs the diesel which eats more payload. The pin weight should be roughly 20-25% (I think is what is suggested) of the loaded trailer weight. Plus the weight of the 5ver hitch. So a 10k oh 5ver could have 2000-2500lbs pin weight, plus the 5ver hitch, plus the family weight, plus the small items you may have fit in the truck bed.
I am sure more experienced 5ver owners will chime in! But hope this helps a little as I am still learning about them!!!
What did you look at today?
And how is the new truck???? Lol