Amazon has PlayStation 3 and Xbox 360 versions listed at $59.99 for August 31st. It's worth noting that Onslaught is actually the only pay-for DLC ($10) included on the Ultimate Edition. The VIP content normally comes free with new copies of the standard edition, and the Limited Edition bonuses -- apart from the two weapons from 1943 -- can be unlocked the old-fashioned way (by playing the game!). Since the older version of Battlefield: Bad Company 2 retails for $40 or less, it becomes a question of whether you want the included Battlefield 1943 with an effective discount of $5 (its regular price is $15).
We've contacted EA and will update this post if we receive any official details on the Ultimate Edition.