Please help me decide: Refurbished iMac 27-inch 2.8GHz Intel Quad-Core i5 processor is $1,449 ($1,535.94 with tax) from Apple New iMac 27-inch 2.7GHz Quad-Core i5 is $1,694 (no tax/no shipping) on Amazon. The only difference I see between the two is the new iMac's have Thunderbolt and faster video. My understanding is that currently there are not many Thunderbolt compatible devises out there. I know that will change in the future; however I am somebody that does not upgrade my hardware (except ram) and/or software all that often. I would like to keep my iMac for at least 5 years. I mostly do word processing, research on the internet, some 2d cadd work, and some web site design (on my company web site). Do you think the $158.06 is worth it to go with the new one? Thanks for all the help.