Juice is mostly sugar and has far less nutrition than fresh fruit. I think most parents (myself included) tend to think of juice as a healthy drink, but it is better to do like you have suggested and push water and save juice for a treat.
Agreed, I try to keep natural stuff around as often as possible, apple juice, orange juice, but sometimes I can't escape kool aid, Hawaiian punch and tang. But as oppose to coca cola and pepsi, I think it's a better alternative, but yess water as much as possible.
I discovered a fruit stand not too far from my house and wow the prices are incredible compared to the supermarket. I bought $16 worth of fruits that lasted a long time. My older sone loved apples and my younger one likes strawberries, grapes and oranges. I try to keep some around as often as possible. I also am cutting back on sugary cereals and replaced them with Cheerios and Kix. My kids love them as well. I guess I'm a lucky dad.