Hi guys. Am torn between the top end 21.5inch iMac and the low-end 27 inch one. I am torn as I wonder if the 27 inch will be too huge for my eyes, and will be hard to use what with websites being postage stamp size on the display. Also worried that non-HD movies will look cack on the 27 inch display. I mainly network, surf and watch movies on my current Macbook Pro. I also do graphic design in Photoshop and use iMovie for short film editing. I asked Apple sales and they said I should buy the quad core iMac - but I'm not sure I trust them as they could easily "recommend" the most expensive model! Please, an honest review? Thank you!