Pre-built boxes are good for someone in a hurry or someone who has a hard time building. Kits are a good choice for someone who has a little time. They require gluing, sanding, and painting. They are usually a little cheaper than the pre-builts. The biggest advantage is you can customize them to fit your needs.
Many pilots also add their own graphics.
The last choice is the XL-15 class, and about the only thing to say is to wait till you've been flying for a while before you get this type of box. These boxes are for the serious pilots only, as they tend to hold lots of donuts. Below is the list of prizes for the last raffle of the current season. Precision SAE Screwdriver Set, Including Case 2. Precision Z-Bend Pliers 4.