Im a senior at high school and im thinking about purchasing a white iMac 24 inch but im not sure if i should go up to the 24inch instead of the 20inch. I do a lot of graphic design as a hobby, yearbook work, school presentations (powerpoint and keynote), and write for the school newspaper. My biggest concern is will photoshoping with a 24 inch be difficult? because with the tool bars being 22 inchs apart. Will this be tiring on my eyes? The 24 inch white iMac is still about $1850 CAD with tax even with it being on clearance. My original budget limit was $1000 but i can cope with the increase. But will this iMac last me 2+ years? and would it be worth the price hike? Thanks! Nathan C.