Hi all! I am currently shooting with the 40D .... no major complaints, but considering an upgrade. I read that the 5D really makes shooting in low light situations much easier ... experiences? Any other pluses you have personally experienced? 80% of my work is on location children/ family work with the remainder being weddings - main issue with the lighting. I do own an external flash (580EXII), but no other lighting. Any feedback is much appreciated! Let me know if I need to provide any further information! THANKS!