Bosch Quick Change Hole Saws
For every problem, there is often a solution, and the Bosch Quick Change System might be that solution. I have seen the Bosch Quick Change Hole Saw System in the hardware stores for a while now, but I never really gave them a good look. They act much like a quick release chuck for your drill, making things a lot simpler.
The best part is you can use this technology on your existing holes saw using an adapter, then when you need a replacement you can buy the new Quick Change Hole Saws.