This would be my choice. Has the power you need, a cast ring type burner and it's controllable from a very low flame to high output. Heavy duty stand with 16" x 16" grate. Very good value IMO at $49.97 I have one:
Bayou Classic SQ14 Square High Pressure Propane Burner
Might want to get a 60qt pot if you're going 10g full boil batches. Either way the SQ14 will serve you well. You could go with the Banjo or Hurricane, but I don't know if it's worth the extra coin.