Here's what I've found out so far. Because the Tempest is a DVC driver with each coil being 8 ohms, I need an amp that'll push at least 250-300 watts into 8 ohms in stereo, or 500-600 watts into 4 ohms bridged mono. The only 2 I've found that will push this kind of power into these loads is the Mackie M1400i, and the Crown XLS 402. Both have very good specs with S/N ratios of >100, and DF >200. They're a bit pricey if purchased through retailers, but seem pretty reasonable on ebay. The M1400i seems really nice. It pushes 1400 watts into 4 ohms brideged, which would be nice if I ever wanted to run 2 Tempests with it.