I don't think any one repo has all the add-ons you're going to need.
That's why it's good to just download a build (like The Beast) that has all the repos and add-ons already included.
BTW, looks like the maker of The Beast is limiting how many installs of The Beast you can do to cut down on resellers on ebay and Craigslist.
Now, you have to sign up with an email address and get a PIN before doing an install.
Lot of custos don't like the beast. I get a lot of sells off people that already have a stick w the beast on it but don't like it