Hi. I purchased the new 17" MBP today with 320GB 7200RPM and 4GB RAM. I wanted 8GB RAm but at $1200 for the upgrade, it was just too much. I also wanted 500GB HD in the future. So my question is.. if I don't want to do it myself, am I able to upgrade hard drive and memory later at the Apple Store? I was thinking to upgrade the RAM to 8GB when it gets cheaper (hopefully end of the year) and upgrade the hard drive to 500GB whenever it becomes available. Will they do this at the Apple Store? And for those who have heard or done upgrades at the store before, do they usually do it same day? Oh.. and for example..suppose the RAM upgrade cost $600 later instead of $1200 on their website as it does now.. would they charge $600 + installation, or just $600 total? Thanks.