Hi DD, There are a couple of Stickies at the top of the Salt Water Section that will help you to answer the question of which unit is recommended. There are a number of different options and manufacturers with SWCG's, you are looking for output of chlorine per day to do an honest comparison. $3K sounds a pretty high to me, what brand of SWCG did the pool store include for that price? The one piece of advice I will give you is to make sure you go with a unit that is rated for a pool 2 -3 times larger than your pool. You would need to price out a unit that is rated for 34,000 - 50,000 gallons. Once you read the stickies, you will have a better understanding of run time, cell life and efficiency. The $200 unit will in all probability be a waste of money.