Thank you in advance for your help, I have been reading alot here, and see that there are quite a few people in the know, and have been very helpful in the past. I hope to be able to tap that myself!

Here are the usage particulars:

- 3700 sq.ft. home with 3.5 bathrooms, 2 with bathtub, 2 Showers with water saver heads
- 1 bath, and 2 showers a day, typically.
- 5 people
- 1" copper softener loop
- Based on water usage, for the previous year, (not including irrigation) averages about 500 gallons a day. (I'm guessing the kids take too long in the shower)

Here are the water particulars (municipal water - Blaine, MN)

- hardness (grains) 18-20
- iron (ppm): 0.00

After I talked to the City Water Super, he commented that the iron is 0.0 for 9 months out of the year, but during the summer they have to use extra wells, and that they poly during those summer months, but I might see some days that approach 1-2ppm.

My concerns; My family will be getting smaller in the next three years. I don't want a system that will be grossly oversized. (I don't mind if it back washes more than once a week, for the next couple of years) From the various calculators out there, I seem to be coming in with recommendations that vary between a 80K and 110K.

Should I stick with a 80K unit? Is that too big? Standard resin ok, or consider a better stuff, for the longevity? Turbolator a good idea too handle the occasional Iron the system will see? I do like the idea of a larger resin tank, to facilitate better flows. I will probably pair this with a Fleck7000 head.

Point me in the right direction...Please?

Take care.