You'd probably manage an acceptable clock with that cooler.
People do 4GHZ on the stock cooler.
Couldnt agree more, with theese chips a high end dual tower is a bit of a must tbh. The heat they generate cant be compared to other intel cpu's.the silver arrow sb-e cooler is on today only @ £48
buy the best cooler you can afford regarding ivy/haswell and make sure it can fit inside your case