Hi chaps, I'm really pleased with my 550d ... I spent some money on a canon 100-400 and a 25-105 L but almost every time I browse images shot with either of these two lenses and see something really impressive it's almost always been shot with a 5D MKII ... the IQ of these f/fs seems stunning but the cost of the 5D is beyond me, are there any reasonable f/fs that can compare ? Best Roger