I don't see much posted about it here, but curious about the newer cameras like the Sony HDR-XR550. Which can record full 1920x1080p to an internal HDD in the form of AVCHD. I realize it's not the same as capturing full HD to an external HDD, but how does it compare to HDV MPEG-2? Vegas appears to be very compatible with the new Sony AVCHD models. But i'm assuming the compression might be more of an issue than with HDV?