A friend pointed this out to me as a novel item (though I am sure there are people that use it in a more meaningful way);
LensCoat LCN18105VRM4 Nikon 18 - 105 Lens Cover, Max4 LCN18105VRM4
Aside from that, I think most of the other basics have been covered off already.
The whole filter/no filer debate has raged on forever not only on Nikonites but many another forum too. I think it's personal choice. As already said, some people swear by them, some people swear at them!
By personal view is, if you're going to get one, pay that little extra and get a respected brand (Hoya, B&W etc).
Also, only you can decide if you need it or not - take a picture with a filter on, and one with the filter off - can you tell the difference?
If not, then again, personal choice, do you want to spend money on something that brings no picture IQ benefit in your eyes, but may offer protection in other ways, or do you want to save that money and risk the chance
On the subject of bags - always get something that is slightly larger than for the kit you have now - you'll love yourself for making that decision in the future!
