I am a commercial wedding, artwork, portrait photographer who has used film for my entire career. I use Portra 160NC for any work whjich involves people as subjects. I am seriously considering switching over to a digital SLR system. My present camera is a Canon Elan7. The digital camera I have my eyes on is the Canon 20D, an 8.3 Mpx camera which is quite new on the market. My questions are these: 1. is there a narrower tonal range possible with digital than with film, as I have heard from some other photographers; I have done a preliminary test which suggests that this is the case. 2. is there poorer tonal gradation with digital than w/ film? again this is something I've heard but haven't yet experienced 3. is there less exposure lattitude? 4. is there less flexibility in recording light sources of varying color temperature (e.g., flash and tungsten) Any of you who have used digital SLR's fairly extensively, I would love to hear your opinions on these issues. Thanks. Dave Moore