Here is a comparison of the 50D and 40D. Not enough of an upgrade for me - I'll hold out for the 60D
http://www.dpreview.com/previews/canoneos50d
Here is a comparison of the 50D and 40D. Not enough of an upgrade for me - I'll hold out for the 60D
http://www.dpreview.com/previews/canoneos50d
My Reef System: 215g Brick 72x24x29 Dual Overflows | 4x 250w MH | 4x IceCap 39w T5 w/ Actinics | MSX-250 Skimmer | 1/3hp Chiller | 16w UV | Aquacontroller 3 | Lunar Sim | AquaSurf |Tunze Wavebox | 2x Tunze Stream 6101 | MRC Dual Nano Calcium Reactor | GEO Kalk Reactor | Pan World 150PS Pump | Phosban & Carbon Reactors