its all about that performance...
take a set of 12.5lbs 15" wheels against your 19s...u better believe there will be a huge difference.
But if you don't care too much for performance it wouldn't bother you, or the average person for that matter.
you might benefit from bigger wheels by having a wider tire but if your wheels weigh more than stock ur killin ur performance overall...
And yea having subs in the trunk wouldn't make much sense if you were worried about rim weight
