Anyone with experience with various aerators to DIY install on a well to aerate and supposedly remove the sulfur smell/taste? Sounds too simple to me.

I'm having some water quality issue on a shallow jet pump well, and have decided to make the switch to a submersible pump drilled below the clay table so I don't have the nitrates in my water I currently have that are above EPA guidelines. I was calling around today, looking for rough pricing from well drillers in my area on getting a new well. Everyone was actually pretty much at the same pricing level as far as the price to 180' and then the price per foot after. I had some questions as far as equipment goes, each one of them wants to supply different styles of equipment. I was wondering if any experts in this field could explain the proper choice of what was offered. New Well Info: 4" Well 180-220' Deep Conditions Depending 20-25GPM (All three drillers said they could get this, I'd like to use it for yard irrigation and potable use) Equipment: Driller 1: 1HP Submersible Pump 88 Gallon Pressure Tank 40/60 Pressure Settings Driller 2: 1HP Submersible Pump 3 x 88 Gallon Pressure Tanks 40/60 Pressure Settings Driller 3: 1 1/2 HP Variable Speed Pump 2 Gallon Expansion Tank Constant 60 PSI I was really intrigued by Driller 3's option of the variable speed. I've never heard of such a thing on wells, and the idea of a small tank and constant pressure sounds great. Are there any draws backs as far as maintenance and does this actually work? As far as Driller 1/2 who's got the right idea with the quantity and size of the tanks? Are there anymore major questions I should be asking in regards to making the choice? Not sure on rules on talking about brand choice on here and if we can do it? But are there any of the major brands I need to stay away from as far as pump choice? These three all used Grundfos, Goulds for pumps, and Flotec and Wellrite for tanks. Thanks in advance,