Funny. I got my Das (same as yours) and then decided to learn Dvorak. The amount of effort is measured by the force required to depress the key AND the travel distance. That said, having gone from a MacBook keyboard (scissor switches) to Cherry MX Browns, I still felt from the moment I got my Das that the keys were lighter to press and it took less effort to type, even bottoming out (which you might try to train yourself not to do).
I still use my MacBook and therefore I'm still often using its keyboard, but I really don't like it so much. Scissor switches are fine, but sometimes you can really notice them getting slightly loose and weaker over time. But it took me a little time before my Das became preferable to the MacBook keyboard, and again I encourage you to try typing without bottoming out.
As for switching layouts, I'm a big fan, but making the big change from QWERTY isn't a decision made lightly. Also, make sure you research the other alternative layouts before making your final decision. I chose Dvorak because it suited my preferences, but other layouts are just as efficient and you may like the look of them better. People tell stories all the time of switching from one layout to the next, though I will say that most popular layouts created for efficiency are more enjoyable to type with than QWERTY.