FZ8k - the "k" stands for black, so there must be a "s" silver model too.
As one reviewer put it.
The FZ18 is not a replacement for the FZ8, it is more of a big brother.
Here is a link to a review of the FZ18:
It spells out all of the differences between the FZ8 and FZ18 on the first page of the review.
Only you can determine if it is worth the extra cost to you.
i want to buy a nice digital camera for hobby purposes. i would love to get a dslr, but i think i would just get myself over my head. i have looked at the two panasonic models and both got fairly decent reviews. is it worth the extra money for the 18 or would the 8k be a good choice for the price.