Liquid cooling used to be a scary thing for the uninitiated. It required lots of research, patience, technical know-how, and a little luck never hurt. These days self-contained liquid coolers are as comon as the cold, most of which don't require any maintenance. If you've been thinking about going down that road, check out today's top deal for a Corsair Hydro Series H55 Quiet Edition Liquid CPU Cooler for $65 with free shipping (normally $77; additional $10 mail-in-rebate). It's easy to install, great for small cases, and never needs refilling or priming.