Both types of vacuum sealers will help you save hundreds on your food budget. Which type you prefer is up to you.
Edge sealers are smaller and more convenient in many ways. But bags are more expensive, and you can't seal liquids without annoying workarounds like freezing or placing a paper towel in the bag to sop up moisture (and this is true no matter what the manufacturer says).
Chamber sealers are bulky and are a larger initial investment. But the bags are cheaper so you save money in the long run, and you can seal liquids. And, chamber sealers pull a stronger vacuum than all but the most expensive edge sealers, so your food will last longer.
There are pros and cons to both types of sealers. You have to do your research and decide which type will work best for you. Our Vaccum Sealer page has links to several articles that can help you figure out this out.