I'm new to the forum and have been reading for the past week but have been unable to find a good answer to my questions. I'm looking to purchase a good spreader in the range of 80-120 lbs. I really like the spyker models but wonder how much of an advantage the stainless steel hopper units offer over the poly hopper units. I'm specifically looking at models s60-8020, s60-9020, and s60-12020. Any comments and advice would be greatly appreciated.