Never put your city on wealth; tisk tisk.
Also, for those who are discouraged about loading times, check out civfanatacs.com. In the creation forums, they have created mods that moad immensly fast on even the slowest of systems.
For those of you that are angered by the random rolls that make spearmen distroy your tanks, & galleons sink your submarines, I reccomend the Rise & Rule mod. ALOT more techs, units, civs, plus modded unit life bars. For example, a crummy canoe will have only 1 bar of health, while some other units can have 8 or so, plus move many more times & attack in one turn. This mod also evens up the bar on bigger difficulty levels by making it hard to expand in the beginning. So teh Zulus won't be parked next to your capital within 12 turns.
This game, more then most, is more cpu, then gpu intensive. My xp-m @2400 with a ti4200 can run a custom huge map@ 240x200, with 20 civs for most of the game effortlessly. 300 turns in, I get about 25-30 seonds between turns. Turning off battle animations/friendly & automatic moves helps alot too.
Enjoy.
