Here's a couple of videos that show some incredibly detailed custom lightsabers that you won't find in any Star Wars movies.
The first lightsaber, by Martin Beyer of Graflex Saber, has the ability to change colors, a soundboard, and an actual lightsaber crystal within that you can reconstruct and remove. The second one, by Hampton's Handcrafted LED Sabers, looks great as well. It has a chassis system, a crystal chamber, and a power level indicator.
Check out the videos below: