Water… Distilled? Purified? Hose??

I am definitely not looking for cheap, just cool. I have a 440 stroker small block, long duration cam, and an Eastwood crossflow aluminum radiator along with a Derale 2100 cfm 2 speed fan. With a Flow Kooler mechanical pump, it would get to 210-215 after about 30 minutes of cruising around town (in 95 degree heat) and I would quickly head to the house! I have since changed to a Speedmaster electric water pump and will road test that soon.

This all prompted me to think about the coolant. Right now, I have hose (well) water and 1.5 bottles of Water Wetter. I just bought an additive called Engine Ice to try also - Engine Ice