Do it.
Tropico 3 is bloody awesome, and the price it is atm. You're be stupid not too. I bought both the original and the expansion at full price, no regrets at all.
Hell, PM me you Steam name and I'll gift it to you if I have to
In other news, holy shit balls is Darksiders brilliant in 1080p 60fps. My god. I have already finished it on 360 but it was plagued with slow down, 30fps and tearing. Playing it now on my PC is just godly (wireless 360 controller of course, would imagine keyboard + mouse would suck ass). Just wish it was Games for Windows Live, have much invested in my Live achievements, don't care for Steam ones.
Damn Microsoft and their Achievements, I don't feel like I'm getting the most out of my games unless I am contributing something to my Live gamerscore these days, it's the only thing holding my back from going all PC these days.