Recently got a Cervelo Soloist Carbon with a PowerTap Rear wheel. The Wheelset is a Bontrager Race X-Lite and is fine for most riding. However, I've heard recently that getting just a front deep dish wheel, like a Zipp 404, would provide almost as much benefit as having them on both the front and rear for racing. Is this true? I certainly don't want to replace the powertap Bontrager wheel.