I always always always recommend tint. Tint is wonderful. First of all its a huge privacy boost, because its harder to see you in the car. Plus its cooler, protects the interior, and protects you from all that unnecessary sunlight. My car has dark tint, its white, I think it looks great personally. The previous owner (mom) had the max legal tint installed.
I attached a pic here, I know its not silver, but it may give you an idea.
[REMOVED PIC because I realized its just a bigger version of my avatar, duh]
Can't help you much with Mark Levinson. My car has the ML sound system, I think it sounds really, really good. Thing is there is a center speaker that goes in the dash, Im not sure if non-ML cars have that, might be a problem, also there are speakers by the windsheild and other places. Someone else will know.