Mike, Hi there,
You don't say the weight of your Luner end bed but I expect fairly light incomparsion with my Elddis 540, I plumped for a Freelander as I needed that one for the weight 1560kgs (Van) I have a added benefit of 150kg tow bar weight with the freelander. The Kia Sorrento is a good puller too just check kerb weights to suit your Van
Tony