I have to say I think emma is the best along with dan. Her acting in chamber was so good, with her crying, but dan's emotional seen in hogsmeade in POa just didnt work for me, i thought he was unsure or just couldnt cry..but he was making alot of sad 'noises' tehehe. ron is always sweet, but he is just so big in character acting i cant really tell if it's ....well no cause it is 'ron' I can't pick one there all great.