Well even with the release of the new Beltronics Magnum which added a huge performance boost over the original Beltronics STi Driver radar detector, We still would choose the Escort Redline over the new Sti Magnum. Both radar detectors use the same platform and offer the same features but rumors are there will be an update for the Escort Redline which will add band segmentation (Currently available on the high end custom installed Sti-R Plus) which will give the Redline an advantage. We are not sure if they plan to also give this feature to the new Magnum.
Many people have been requesting that Escort add Band Segmentation for a few years now on their windshield mounted line and Escort has acknowledged that they were listening. When this update comes it would definately push the Escort Redline into the Best Vehicle Radar Detectors slot when looking at performance.