I'm quite confused about making a decision between this 2 model. Is it a smart move to upgrade from 500D to 50D? Budget tight or else will go for 7D. The specs claimed that 550D has higher resolution and megapixel whereby the 50D has higher frame per sec. I like the solid feel if 50D and the LCD screen on top of the body and also 50D has more function to play with. May I know is 50D colour really not so nice as compared to 550 and which model had the sharpest image? Generally use it for birding only. Can someone advice me?