The FE108ESigma's may cost a little more than you were looking to spend, but they are about the sweetest sounding driver I've ever heard. I have one pair on OB with an OB bass augmenter and one pair in the Fostex recommended RLH and both are simply outstanding. I got mine for $75/pr including shipping, plus they were already broken in, which I understanding is an excrutiatingly long time. As long as you have at least 8W/ch, you may never buy another pair of speakers again.