Ben;
If you want to split the screen and view the plotter and FF simultaneously, those small screens on the Garmin 18X units are going to get REAL small and you are not going to be able to see much detail.
If your budget is $1k, I'd suggest seperate units.
I have a 2006C with the black box sounder, and when you split the screen, it is smaller than the full screen on the 18X units.
Another suggestion - boat show season is upon us. There will be some good deals to be had.
I got my 2006c & black box last spring from Defender when they had their Miami Boat Show pricing in effect. I paid less than $1850 for the 2006C, the black box and a 32MB chip, which is about $500 less than typical street prices. You can get those prices with phone or internet orders - don't have to go to the show to get them.
I am sure other suppliers will have good sales during show season as well. do lot's of looking.
You may also want to consider the Standard Horizon (not sure if it has a FF) and the Furuno 1650/1850 units. In the end, I was down to the 1850 and the 2006C. Went w/ the 2006C b/c had a clearer display (at the time), was less $$ (by a little), the Mapsource software and I was used to other Garmin products, so it felt easier to use to me.
WP