Aqua Systems water softeners?

I got a quote for a water softener and a reverse osmosis system from a company called Aqua Systems. The price they quoted includes installation, and a 5 year parts and labor warranty.

Does anyone have any experience with this company and it's softeners.

Here is a link to the options:

I am considering one of these two:

http://ilovemywater.com/Res-Products.aspx?ID=13

http://ilovemywater.com/Res-Products.aspx?ID=10

Also, there is a $100 difference between the 32,000 and the 52,000 grain. With a 2800 square foot 3 bath home and with 2 daughters (one of who is a teenager) is it worth the extra $100 to get the bigger tank?

Any advice would be greatly appreciated.