The Athena AS-B1.2 is a decent entry level speaker. At very high volume levels, the highs can become a bit harsh, but this is not apparent at most normal to moderately loud use. For decent performance in your budget range, you can pick up an inexpensive sub to use with the Athena's and have quite a nice entry level system with an easy upgrade path. That is to say, when the budget opens up, you can get some better front mains, a center, upgrade the sub and move the Athena to surround use. The Athena are decent enough that you can continue to use them even as you upgrade the speakers and components around them.
For a starter sub, Sony has some decent ones in the $100-150 range.