The jury's out on whether Microsoft was right not to equip the 360 with an HD DVD drive from the off. On the one hand it meant we were playing Call of Duty 3 on an affordable machine long before the PS3 ever arrived. On the other hand, now that it's finally here, the all-in-one PS3 is pretty much winning the hi-def format war for Blu-ray all on its own.Until now, Microsoft's compromise has been the external HD DVD player add-on, but could things be about to change? There are whisperings that an 'Ultimate' package could be on the way with the lowly DVD drive ripped out and a fresh new internal HD DVD spinner slotted in its place. Other stats being banded about include a 320GB hard drive – double that of the Elite (pictured).The source is fairly ropey – staff at Gamestop in the US have apparently spotted a stock code – so we wouldn’t bet our grandmother on it, but it would make sense. It'd allow storage intensive games like Grand Theft Auto IV to be sold on high capacity discs (as with the PS3) rather than crammed and compressed onto DVDs.We’re just wondering how far Microsoft is planning to push the 360. What’s next Bill, the Xbox 360 Super Mega Good Fantastic?EssentialsMicrosoft Xbox UltimatePrice: TBAOn sale: TBA Contact: MicrosoftRelated stories:Xbox 360 Premium joins the EliteXbox 360 prices get ready to tumble?Price tag for Xbox Elite