I know that I am asking a very absurd question but I do need to know this before deciding on a mainstream Canon Power Shot A640(US $400) or the dSLR Canon EOS 400D(Rebel XTi)(US $1000).
I take on an average 50 pictures in a month mostly of people(in Daylight, Night Time, Night Long Exposures), HDR(multi shot overlap) and some times nature & architecture solely for personal and creative use. I am not much into changing the lenses and I may never buy anything other than the 18-55mm kit lens but I am very very fond of image quality, color vibrancy and saturation, edge to edge sharpness, contrast etc. I rarely print the pictures as I watch them on our wide screen 19" LCD or XGA DLP Projector. So please let me know,
1) Why should one spend 250%

extra on a dSLR?
2) Can the pictures from a "Really Good"

main stream DigiCam come closer to the "promised high quality" of a dSLR on the Kit Lens?