For budget reasons my first UW camera was the DC100, and later the DC500 when it came out. Both took decent pics uw and above, but are really entry level cameras. There are better cameras out there, but at a lot higher cost. I would make the same choice today if I was fist trying uw photo, purchasing SeaLife to get my feet wet, so to speak.
I seldom use the strobes I purchased with the DC500, as I like the small package the camera alone makes, and have always had a struggle getting good strobe shots. W/o the strobe you have to get close, which takes patience, but makes for better pics. Both cameras are capable of taking better pics than this amateur is able to take advantage of.
Can't speak knowledgeably about the 1000, as I have yet to try one, but I have been generally quite satisfied with their earlier models so I would expect to be satisfied with it too.