I copied and pasted the below from an old post of mine:
Just some advice I got.
Apparently, and remember my expertise level (zippy), you have alot more control when setting up your computer, if you do install yourself. Pre-installed, no matter what it is, will follow a generic-default procedure. I also talked to my LAN Admin at work, and he said if it were him, he would like to have the box, manual, and all the disks, not just the recovery disk from SAGER. He said the recovery disk would only fix x.x% of your problems. I couldn't really tell from my research the difference between buying the entire product and a having the recovery disk, the forums seemed to be split, so I went the safe, if not more expensive route.
Granted, it would have been much less of a head-ache and cheaper to get it pre-installed, but I'm kinda enjoying this learning experience. The PROS to my choice are peace of mind with the original disks, and more "Options" during the install. Now, I don't know what those options are, but I'll get there.