I'd love to have the Autogeek Professional Detail Bag.
Here's why:
1) Not many bags can fit one polisher, let alone 3. More polishers leave you with more options.
2) It seems the biggest out of the three autogeek bags, and we all know bigger is better
3) I've been looking for a bag that could be my detail garage on-the-go. This would fit that need perfectly.
4) If I don't win this bag, I'm going to buy one anyways, because it's that useful.
5) This would allow me to be more useful to friends and customers not wanting to do detail work at my place.
6) If I had to go through a touchless wash (my garage can't fit my camaro :/), I could use this to carry all my detail spray, wax, microfiber cloths, polisher, compound, final polish, pads, clay, and LSP if I wanted to.
7) A bag this big, and yet not over the top big, could be taken on airplanes and be used for travel purposes too, so it would be quite the versatile bag!
That's just off the top of my head, I'm sure this will have more uses though!