We currently use 10D's (yes, I know those are ancient), and I use a 50mm 1.8 lens. The lens for the other camera is 28-105. We're considering upgrading both cameras to 40D's. We're also considering getting a 24-70 2.8L USM EF and a 50mm 1.4 USM EF. We do mainly portraiture and wedding photography. Do you guys have any suggestions on these? Any suggestions on which order to buy them in (we'll probably get a piece at a time).