Hey all, I'm planning on buying a Panasonic HVX200a and an iMac. I'm thinking about buying the $1199 imac but I'm afraid that the ATI Radeon HD 2400 XT w/ 128MB gfx card won't be enough for editing 720p HD(I probably won't be editing 1080p). I'll be upgrading the RAM on the iMac, so not worried about that. Is there a lot of lag and dropped frames when editing HD video? Is that imac good enough or should I stretch my budget even more and go for the $1500 iMac? Thank You all - any help is highly appreciated!