hey guys, i have a couple questions. first is regarding the d300 raw image file size at 14 and 12bit - how large? i own a mac g4 now, and i know it won't be able to handle the files from this camera, so i'm thinking about upgrading to a 20" imac. 2.4 ghz with 2gb ddr2 ram and 500gb serial ata should be nice move.. i'm just wondering if i should maybe go with 4gb of ram and wondering if i could afford that. anyone with any info would be a big help.