I hate dark wheels, but I wasn't about to pay $1500 for one specific wheel *upgrade* and to be forced into 19s. I actually bought aftermarket 18" wheels to replace the 19s my golf came with. 40 series tires are fine, why do I need 35s? Plus, for $1500 you can just about get a set of wheels AND tires, I find it insane that automakers price the "upgrade" as much as a whole new 2nd set.
If I'm going to spend the money, I'd rather get a wheel I choose-- though I admit I like the look of the 19s; I MIGHT have paid a bit extra for that style in an 18.
I've got the cap kit and will probably pull the aero covers so they don't get beat up too badly by my SO, but maybe slap them on for long roadtrips.