has anyone on this forum used either a sony hdr-550v, jvc GZ-HM1, or a canon HF s21 camcorders with their imac? i am currently using a 2 and 1/2 year old iMac with dual core 2,4 GZ and 2 GB ram 667mhz along with iMovie '08. i currently have a 5 year old minidv that has worked flawlessly with my current setup. i want to buy an HD flash memory camera and basically want to get a better quality of dvd's to send to family and friends. i've eliminated the Panny tm 700 as it seems to have way too many problems for downloading and video editing. my backup plan is to use my Win7 64 bit i7-860 with nvidia gtx 260 video card with 1 GB ram which i just purchased for my work. however, i'd love to stick with my mac since i've learned how to do my projects on it and i'm familiar with it. going to a new system with new video/photo editing software seems a bit daunting. any and all opinions/recommendations would be most appreciated. thanks.