If you go to amazon.com and do a search for Oblivion, then you will find that it says both versions are DVD. Hopefully there isn't a cd version.
I'm definitely picking up the regular version. I'm not really interested in a pocket guide, Making of Oblivion documentary and Septim gold coin. Now if it was the only way to get the game on DVD then maybe it would be worth the extra 15 bucks (it's only $53 on Amazon.com). The regular version is $45 on Amazon which is pretty close to Outpost once you add shipping costs ($43).
I'm a little worried about system requirements. I might need to buy more computer memory but not sure yet. Given the deal is only 2 dollars better than Amazon's normal price, I'll wait for a better deal.