Am trying to decide between Dell XPS8300 and an iMAC. Am an author; take over 1000 digital photos of travel per year. Do much editing and artistic creativity with them, so want best system and display I can get. Need large hard drive. Also am semi-invalid, spending much time confined to bed, so want to be able to watch tv on my computer. Would an all-in-one or desktop be better for me? Looked at the 27" imac. Do I need a monitor that large? Want to be able to use CDs and documents written on a PC with Windows. Would need to instal Photoshop on a mac but the photo progeam that comes with the Dell is adequate. Any and all advice welcome.