if you have good airflow inside your case, you can get similar cooling (if not better) with the best air coolers, like the noctua DH14 or thermalright silver arrow.
Liquid cooling is not better than the latest heatpipe coolers, it just move the heat to an easier exhaust point.
See the best coolers here, with plenty of great reviews:
http://www.frostytech.com/top5heatsinks.cfm