In the past, when technology was still in their infant stage, may be it makes a different whether it is CMOS and CCD, but now over the years, much R&Ds have sunk into improving the quality, which we have reached a stage where by the differences are quite negligible. Yeah, there may be some noises here and there at higher ISO, but you have an option to activate the in-camera noise-reduction or incorporate it into your post-processing workflow, hence not really an issue.
As for CMOS consuming less power. Take the D70 for instance, it uses CCD, but with a fully charged battery, it can handle about 1000 shots. May be their R&D has discovered a new method for extended battery life, I dont know.
When getting a DSLR, IMHO, the more critical issues are:
1. What is the camera for? For sport, portrait, still life, landscape, travel etc. each of these encompasses different requirements on the camera.
2. Are you buying a camera or a camera system. For camera system, you would be looking at a whole range of possible lenses to support your needs bcos some photog only support original lenses.
3. Who is using the camera? Is it just you or your family members? Do they mind the size and weight of a DSLR?
4. Do you have plans to share lenses with other photog? If the answer is yes, then compatibility is an issue.
My 2 cents.