Wheel spacers~ Has anyone used them on their 2007 + up altima?

[lyon74]

Hey guys. I need some help. I'm torn between 3mm and 8 mm spacers for my car. I got the 19 inch stock Maxima wheels already on the car. I bought the 8 mm ones but I don't have enough stud threads to get a good bite with the lug nuts. I'm used to my chrome wheels sticking out a little further than the stock ones. The 19's look like they are tucked a little bit. I was thinking of just spacing the back so they look staggered. Then was afraid they might look stupid so then I was thinking all 4. My question is, has anyone tried the 3mm spaces with the original studs and lugs? or has anyone tried to use the 8mm thick spacers and replaced all their studs with longer ones? I'm thinking if I get longer studs and then don't like the look with the wheels I won't be able to use the stock lug nuts when I take the spacers out. Has anyone tried this yet? Thanks.

This is a pic of the car with no spacers at all. The rears look tucked a little. I'd like them to have a wider appearance. Let me know what you think. Thanks!