Best bang for the buck? Rear sway bar.. yours ( and mine) do not have it ( didnt have it). Find one used with the end links. Dont buy into the hype for a aftermarket bar unless you plan to take up autocross then you have the wrong car anyways. Next bang is dependent on which interior you have. I had the partial premium. So nix foglight and nix on ambient lighting and rear seat heating. I got the Bonus module and some fog lights off ebay so I now have creature comforts and lights that switch on with the headlights without wiring mods. I also swapped out all the interiors LEDs because they suck. Next mod could be #2 if going by price.. but it was #3 for me.. RPM Tesla's wind noise kit for the doors/frunk/trunk. I splurged and got the Funk mat and the trunk finishing noise reduction panel. I also added some stick'm "Carbon Fiber" for the center console/wheel. All in is under 800 and of that, 400 was the bonus module. I'd like the LR but I dont want to pay the extra money. The standard+ has worked out very well for me and with the one motor, pretty cheap to insure since it's not a "performance" car I do have the cheap audio cable to enable the rest of my speakers but I have yet to put it in. What I really, really want is the S.. I found that my OEM continentals work pretty good ( 19 inch) all things considered. And yes, Matt screen protector.. the gloss drove me crazy with reflections and glare. I got one the is removable and washable.