hey the apple site says that the 20inch imac is 17.4 inches thick..im wondering if this means from the back of the stand to the front of the screen?how thick is the actual screen? also im in ireland hunting for a desk and i seem to be coming up empty. found one today but its expensive...best ive found tho...how far away from the screen should i be to not blind myself with the 20 inch?!its huge!is a normal computer workstation ok? im confused about whther to get the 17 inch or the 20...with the price diff i could get a scanner and printer but i use fcp so im wondering should i go for the 20inch?