I agree with Veronica. First, think about the features you want. Do you want sanitizing? Do you want a child lock? What finish?
Then go looking. (I'd start at Consumer Reports, but that's just me, lol.) When you find the model you want, get Sears, Lowe's and Home Depot to bid against each other. Get the best price with:
-free take away of the old appliance
and maybe 90-180 days same as cash.
Parenting two active, wonderful boys
This is your world. Shape it or someone else will. -Gary Lew