Sparge water temp depends on your equipment. My best advice is to dig out your thermometer, start with 180*F sparge water, and figure out how much hotter or cooler you need it to be based on where your grainbed ends up.
My Coleman Xtreme 70 cooler tun has a large heat capacity, so for 5 gallon batches my first batch sparge infusion needs to be about 190*F to achieve mashout. After that I can drop down to 180*F for the second batch sparge and the grainbed stays between 165*F and 170*F throughout the sparging process. When I was using an Igloo 36qt, it had a much lower heat capacity, so my sparge water was 180*F to 185*F for the first infusion and I achieved mashout.
When I fly sparge I do a mashout infusion based on BeerSmith's calculator. I start with 175*F water and by the end I end up with 185*F water to maintain 168*F since I lose heat during the sparge (I have the lid open, I don't have a fancy sparge arm).