Get the Sunfire. You should be able to bridge two of the channels for extra power for your fronts and it's as good as it gets for good clean sound. Not necessary, but it's an extra bonus. The Sunfire amps run cool, and that's something to consider in warm Brazil. Last but not least the Sunfire will drive anything you throw at it, and they're flat out bargains at under $2k used.
enjoy!
enjoy!