Thanks to all for the comments!
Bienvenidos, Mikel.
I wouldn't worry about the D200. Some of your shots are better than stuff I've seen from a D2X. Sometimes, actually a lot of times, it's not the camera but the photographer. 
I think the main problem with compact cameras is not just the image quality but that you can't always take the photo you want. For example: in E900 there is a lot of delay between photos, the auto focus is not as fast as DSLR one and it is not as reliable, you can't change the curtain, when taking macro shots with attached lenses (which is essential to use them) the DOF is reduced to few mm, much less than with a DSLR, you can't take half/half shots, etc.
I only can find one point in which compact cameras are superior, the size. And that makes you able to take photos in small places.
Nice stuff & very similar to what I find in the mediterrean, but you are on the ocean side wright?
Could you tell me about the Mola Mola ? How did you find them, at the coast or out in the bleu, do you see them regulary ?
I like your pictures and especially the oursin abstracts.
http://en.wikipedia.org/wiki/Bay_of_Biscay
Probably I have no chosen the most representative photos of the Bay of Biscay... I live in the Basque Country which is in the right part of the Bay and is a little bit hotter than the left part. Some species are similar here and in the Mediterranean, but they do not appear in the left part of the Bay. In any case, the underwater life here is quite different from the Mediterranean one and the water is colder.
The Mola mola are no so common here but in some areas you can find them regularly. Don't ask in a diving center that you want to see them because they will not assure you to find them. For 2 months we have been seeing Mola mola almost all the dives but now it seems that they have gone.
Ah! my dives are at the coast, I go with my equipment, a friend, my small camera, and that's all 
Mikel