The H50 is as good as a TRUE with push pull fans.
As long as you replace the stock fan, go push pull, and pull cool air into the case. You'll probably see a bit lower temps by a few C at most. It's not bad, give it a try.
Top quality entry watercooling for a CPU (and not a i980 at 4.6 LOL, need more) starts at $240.
Look at the link up top here and this is the basic kit of top notch WC parts. Not really a kit, good stuff sold in a package really. You WILL get better temps 100% for sure with the expensive kit. You get what you pay for.http://www.jab-tech.com/Swiftech-H20-22-Ultima-XT-Liquid-Cooling-Kit-pr-4324.html