Brand list + model list on one page
There are a number of ways to accomplish what you're looking for.
One approach is outlined in my CMSB Cookbook at http://www.thecmsbcookbook.com/recipedetail.php?USING-RELATED-RECORDS-TO-POPULATE-PAGES-FROM-A-MASTER-ADDRESS-BOOK-OR-PRODUCT-LIST-273
Hope it helps,
Take advantage of a free 3 month trial subscription, only for CMSB users, at: http://www.thecmsbcookbook.com/trial.php