Having just purchased and RECEIVED my A-1, I can tell you that you don't get the DDR3 1333 ram like on the X1 that reviewers have raved about receiving, BUT you do get blu-ray, dual 500GB HDD, the Asus backpack and Asus gaming mouse. I thought about saving $100 to get the X1, but I really wanted blu-ray. And the X-1 doesn't come with the 'cage' for the additional hard drive, so that has to be purchased or rigged to add a 2nd HDD.
The A1/A2 are EXTREMELY hard to find. My timing happened to be good and I found it at Beach Camera via Amazon. I got the 2nd to last one. Best money I've spent in a LONG time.