BD7PSR If you're looking for the best value, choose the d9000. If you prioritize resale value, that's a different story. The antenna depends on your car: whether it's a sedan or an SUV, whether it's mounted on the hood or the tailgate, and whether you plan to use it long-term or just for temporary travel. Consider all these factors before choosing an antenna. For sedans, I recommend the d9000 + Diamond 770H (high gain). For SUVs, consider the mounting location: is it on the hood, the tailgate, or the top of the rear door?