Back up a minute! Since you priced one of the the others I will throw this in as well. If you go with one other than what I linked to you will run into the same problem when changing cameras, sooner or later. With Sony changing styles everytime it won't take long before a camera that will fit in it is hard to find. Thus making the housing, again, obsolete.
With the housing that I linked to you can put a HC-1 high def camera in it as well as the PC-100 or 1000. If it has a LANC jack (only Sony now) and you can fit it in the Dolphin Pro, it works. Either way you are looking at at least $1K.
Another issue that I had with the ones that allow you to flip out the cameras monitor is they are off set. The monitor was left of center, the camera lens was right of center. Nothing is directly down the center. So you are holding the camera to your right. Just seemed unnatural. Kinda like the BP/W, jacket BC issues. What works for one doesn't for another.