I only have the Big Shot, but am considering buying a Silhouette Cameo. I participated in a crafting garage sale and made quite a bit, so have the money to buy it. What I love about the electronic machines is that fact that it is much easier on the hands. I have arthritis and using the manual big shot can be tough sometimes, especially if I need to cut multiple images. I don't plan on getting rid of the Big Shot or any of my dies at this point. I am looking forward to being able to combing different crafting methods to create some wonderful things.
Just my opinion, but I think a choice in machines depends on a lot of factors; physical ability, crafting versatility, personal preference, financial ability, etc. The way I look at things, if you do your research and go into the decision with knowledge and open eyes, then you are making a decision that is right for you. Isn't that what crafting is all about ? Doing things using your own personal design preference and vision? So whatever you decide, just keep crafting as long as you are having fun.
Everything in life happens for a reason...especially in crafting!