Either one will work. I am currently using the Dexter E-Z Flex and wet bolt kit on my Jayco. Both the E-Z Flex, bronze bushings and bolts that can be greased at all pivot points are far superior to the stock steel equalizer and Teflon bushings. For no more then they cost the should be std. equipment on every trailer coming off the line.
As mention above the air ride Center Point system is the best, however it will cost the most $ to buy and install. You could also look at the Mor/Ryde RE option if you are looking at options in this price range.
My Equa-Flex just came in yesterday and I am going to the RV dealer today to pick up and install tomorrow. Also while the wheels are off and the 5er is up on jack stands I will bring the wheels to the local tire shop for balancing and then adjust the brakes before I bring down from the jack stands. Then we shall report back on whether it was worth the money or not.
Papa Bob
1* DW "Granny"
1* 2008 Brookside Sunnybrook 32'
1* 2002 F250 Super Duty 7.3L PSD
Husky 16K hitch, Tekonsha P3,
Firestone Ride Rite Air Springs, Trailair Equa-Flex, Champion C46540
"A bad day camping is better than a good day at work!"