Hi JJ,
Welcome to TroubleFreePools
there are several reliable SWG systems on the market. Once thing you will find out is that they all have their plus and minus, so there really isnt a "right" answer to your question.
Probably Hayward Aquarite is the most well known
Pentair
Jandy,
Auto Pilot
Compupool
One thing for sure though, whichever you decide to go with, you want to size the SWG cell at least 2x the pool volume. 3 would be better as it would be less wear and tear on the cell and result in longer cell life.
As for maintaining the pool after installing the SWG. TFP is about teaching people how to manage and care for their pool based upon only putting in the water what the water needs, and not what a pool store may tell you. After all, they are in business to sell you stuff. Whether you need it or not is irrelevent to them.
I would suggest to click on the Pool School button at the top of the page, and start learing about pool care with the ABC's of pool chemistry. Its really not very difficult if its approached in a logical way. Not trying to put you off, but trying to put you on the right track to start. Knowing the ABCs will be very valuable to you.
I also highly recommend that you get yourself your own very good and reliable test kit. Either the Taylor K2006C or the TF-100. Link to the TF100 is in my sig. I support that because it's the best bang for the buck vs the K2006.
Some other references for you
Pool School - Recommended Levels
Pool School - Chlorine / CYA Chart
http://www.troublefreepool.com/calc.html