Havent played in a while. The equipment I have is not good as I am starting to get slapped around in Act 2 Inferno. How much will upgrades cost so that I am the one doing the slapping of Diablo on Inferno?
Inferno MP0 is so easy right now that you can probably steamroll through the remaining acts if you actually managed to make it through Act I pre-nerf with your current equipment (and upgrade along the way if you find anything better of course).
Of course, it's another story if you're planning to play with Monster Power enabled, with each additional MP level causing the amount of Gold required to upgrade your equipment to increase exponentially unless you get really, really lucky and find a really good piece of loot and/or snipe something for cheap from the AH.