> Can I get a deal done at $1000 or $1,200 over invoice?

Depend entirely on the dealer. I am sure some dealers would do $1,000 over invoice, the question is whether any dealers near you will do such a deal.

> Is it worth another $400 to have heated steering wheel, ski bag and headlight washers?

It's all personal desire. If you typically wear gloves in the winter when you drive, the heater steering wheel will not have much impact. Some people actually dislike the headlight washers as they cause the fluid reservoir to empty sooner and can get liquid onto the hood. And if you don't ski, obviously a ski bag is rather pointless. IF you'r an avid skier who carries the skis inside the vehicle, srive without gloves in the Winter, and drive a lot at night on roads with traffic where your headlights get dirty, it may be worth it.

Same with things such as sideboards. Some people like them for looks and ease of entry, others dislike them as they feel they get in the way of entering the vehicle and get one's pants legs dirty in the Winter, if you're not careful entering.

In the U.S. some things are not available except as part of the Premium Package.