Upon much research and comparision, I purchased a set of Cooper CS4's for my 09 Corolla. Coming from the Firestone Touring S4 stockers, these tires were a very refreshing upgrade, being shockingly quieter on all surfaces. Pricing was excellent at $480 for a set of 4, The $50 rebate will bring the total to $430. Grip is improved, albeit the handling is a bit softer. I attribute this to having hit the treadwear bars on the stockers before I changed them out, so they had zero tread flex as there was practically no tread. However, the handling on the CS4 is good, and will only improve as these tires are only 2 days old, once they break in. I looked at the hydroedge and they were more than $200 over the Cooper CS4s, I am not convinced that their performance warrants that premium.