It depends on what types of quilts you want to make.
Personally, I like the Accuquilt Go most for odd shapes that are more difficult to cut with rotary cutter methods. The tumbler shape was very popular for scrap quilts for awhile, and it comes in different sizes now. The hexagon dies are really nice if you like hand piecing (machine piecing works for the bigger hexies) and also works well for cutting the papers for paper piecing.
Several quilters have methods for cutting up scraps so that all the scrappy pieces fit together in quilts, but I think this was usually done with rotary cutters. I remember some books published on the topic, and there are some videos on Youtube also.