I'm contemplating on buying Civ5 (nice discounts there) but i see in forums that the AI is generally bashed hard. I'd mainly play single-player games (hard to gather a team for such a long game) so AI quality is of top importance. I have Civ4-BTS and the AI there is quite solid i think (also there's a Better AI mod to further enhance). The only area they're really handicapped is their inability to effectively use siege units in stack vs stack or city assault battles utilizing the collateral damage potential but apart from that they are quite fine, especially on the economic front. Is Civ5 AI really considerably worse than the Civ4-BTS counterpart? In this case i'd skip Civ5 and stick to Civ4. Better graphics and maybe better combat mechanics doesn't worth it if AI is indeed much worse. If it's more or less the same i'd move on to Civ5. Thanks for sharing your experiences.