i would say get the A4, and you probably should, but the lincoln would be cool also, i think you should get the A4 i have made up my mind, the reason is because it is more sporty and fun and you can roll around with the top down and enjoy the weather when its nice out, the lincoln navigator is cool and everything but it won't be as much fun cruising around in it, and the audi has a more luxury appeal to it, i would get it in white with black rims, because it looks more sophisticated and expensive and the white reflects the light, black absorbs it, so the white won't get as hot when its in the sun, if you really want to be a baller, than just tell them to get you both and stop playing these games, they know they can get you both, tell them that you need a sporty ride that you can have fun in and you also need something that you can carry more passengers and more clothes when you go shopping, you really need both in this situation, if they are really that stingy just get the A4, or tell them to get you a Benz those are cool, but you need get the cls amg 65, its a little pricy but they could probably afford it