Riza,
Thank you for invitation posted in your 5D Owners Opinion at dpreview. I am looking for a SLR camera and have tested 5D with Nikon 50 at the Ritz Camera store. The 5D won very quick by its design and ergonomics. It was so natural and convenient to use. Currently I have a Canon Pro 1. It is an 8MP camera. It is also an excellent camera with EVF. The EVF means seeing menu in the bright sun light, seeing the subject in a very low light because it gains brightness in low light, 8MP very sharp image with good colors and dynamic range. It also means that you have a very grainy and low-resolution viewfinder and you are limited to ISO 50 and ISO 100 (some noise is already there). The only deficiency I have found is 6MP. This size defines the maximum image enlargement which should not be more than 10 X 8 inches at 300 DPI or 14 X 10 inches at 215 DPI (nothing bigger). That is one stopper and another is a note in dpreview related to Konica-Minolta 7D (the same sensor and lens) - Low noise at higher sensitivities, although at the expense of detail and sharpness. I have found that Nikon 50 images are sharper (same 6MP). If you have advice based on your experience please send to leob2100@sbcglobal.net.
Regards,
Leo