Michelin or Cooper would be a good starting place to look for quality tires. I actually liked my Cooper ATR tires better than the Michelin and they were much cheaper. The Michelin tires rode better but the side wall seemed to flex in turns. I just didn't like the feel of the Michelin tires on a winding road.
Be very careful with the Hercules MIC (made in China) tires that you are currently running. When I converted my Dually from 16" to 19.5" tires I took a chance on the less expensive Hercules tires. That was a big mistake. The left front tire blew out and did $4,600 damage to the left side of my truck. The tire was in great shape and gave no warning that it was about to fail. Hercules would not do anything because there was nothing left but the bead ring. I also had three MIC (Marathon brand) tires that separated belts on my 5th wheel. The bottom line is don't buy made in China tires. Additionally, check the date code on the tires and insist on tires less than a year old.
Good Luck
John
*2006 Chevy, 3500, 4X4, DRW, (LBZ) D/A, CC, LT, 252K Miles, 19.5" Wheels, Mag Hytec Transmission Pan and Differential Cover, SS Grill Guard, Racor 2 micron aux fuel filter, 100 Gallon Aux Fuel Tank, using Edge Evolution, Predator Diablosport, Kennedy ECM tune, Fitch Fuel Catalyst.
*2006 Four Winds, Dutchman, 36', RV, D/A, 5500 Kodiak.
*1993 Harley Davidson, Turbo charged, Springer Softail.
*2007 Pontiac Solstice.
*2005 Jeep, Liberty, CRD (diesel).
*Full-timing in USA, see America first.
BUY AMERICAN or CANADIAN, NOTHING from CHINA .