PSA Sceening / do the benefits outweigh risks

To screen or not to do PSA in screening for prostate cancer Is still going on. Two studies have reported recently.
First study from North America reported in NEJM march 2009 looked at PSA and DRE on the rate of death from prostate cancer. Result was after 7 to 10 years if screening did not differ significantly.
Second study was an European Study that looked at PSA and death from prostate cancer. Conclusion was PSA based screening reduced death rate by 20% with considerable over diagnosis .