.superhero10..Have You read the "New Canon HF G30" thread?
I have 4 Canon camcorders. HF S21, HF G10, HF G25 and HF G30. I also have compared files from these cameras with many displays, computers, players and a JVC X30 projector. With HF G30 I always use AVCHD 1080/50p28Mbps because when I shoot cars and Buildings I get much more noise and aliasing jaggies with the 1080/50i24Mbps setting. 25p gives motion artifacts.
I also burn my files to bluray for my friends and they have to put up with the jaggies because I cannot burn bluray in 50p28Mbps yet. I also think 50p28Mbps shows more depth. It´s like comparing a CRT with an old LCD.
The card space is no problem. 32Gb SDHC class10 gives you 150 minutes of 1080/50p28Mbps Movies. I move the files to a 2000Gb harddrive. That is 156 hours. My editing program PowerDirector 11 I use without rendering so the Gb:s are the same after producing a film.
It´s important how you display the files or films from the harddrive. I find WMP direct from the pc is bad. An external HDD connected to a Oppo bd player is better. The Dune smart H1 mediaplayer though is superior picture quality! I have 3. I just move the HDD from the slot in my pc to the slot into the Dune.