Ok so I checked out all the options you listed(thanks a bunch by the way!), and it seems the cheapest option for me is to buy from a powerseller on ebay..... I went up to my OIT department and the guy basically just showed me the "Ultimate Steal" website. I plan on using this to set up bootcamp and parallels, so I need the full version not just the upgrade. Also, would a OEM version for for what I need it for? It seems like I would only be able to set one or the other(bootcamp or parallels) if I were to buy the cheaper OEM version. Any help would be most appreciated! Thanks.
I believe an OEM version would work (except for licensing issues), but did you check on the link directly after the "ultimate steal" link. I can tell you the information contained within has been used with great success and should offer you what you need