One additional piece of info on a sprinkler system. Many cities will discount your sewer bill if you install a sprinkler system. Where I live, this is not the case because we pay a flat rate - not based on water usage. You might want to look into this if you are considering a sprinkler system or already have one installed. The county next to us does offer a discount.
*And, if you want a sprinkler system - try to get it installed BEFORE you finish your basement. We didn't, which means our timer unit is on the side of the house. Had I known to do this prior to finishing the basement, I could have had the timer/control box installed in our garage or elsewhere within the house. I really regret this during this time of trying to grow grass. If I want to make any adjustments to the box, I am forced to walk in my flower beds on the mulch so that I don't make footprints in our newly planted lawn - it's just a pain, but a temporary one.