Here are two great medium-sized suitcases for your long journey: The Samsonite Flux 75cm Spinner Expandable Black is available for R4600. As an expandable spinner, this suitcase has extra room when you need it and wheels that make dragging it through the airport easy. Its black color is versatile too. The Samsonite B-lite Icon 71cm Black for R6699 is also a wonderful choice. As one of Samsonite's top-selling brands, you can trust this suitcase to handle the bumps of travel well. With a 71cm size, it will hold all your essentials without being too large. Both of these suitcases from trusted manufacturer Samsonite offer dependable quality and convenient features for your longer trip. Let me know if you need any other details!