I didn't switch types but just reseeded the yard. I went the route of slowly switching from whatever crap we currently have to Kentucky XX, whatever that number is.
Just got the bad news from the plumber. Whole house is on cast iron and brass piping other than some of the copper piping we are seeing in various areas. Getting an estimate for a whole house re-piping as we speak. shit.
If you're handy at all, you might want to look at redoing it yourself. Shark bite fittings are really easy to use and the amount of money you save could be spent on parts of the house you'll actually see.