stay home losers

Getting a new set of tires for the Floe aluminum 2 place open trailer with bearing resevoirs. Presently have 18.5x8.5-8 tires on 5 lug. Was thinking on using 20.5x8.0-10. The questions are: Which is better Tow-Master,they are 6 ply ,load range C 1105 lbs ($60 each)or should I purchase 20.5...