$300 5.1 + TrueHD decoding does not compute. You'll need to increase your budget to fully take advantage of uncompressed Bluray audio.
The B2030P's are ~$125 a pair, but their sound quality is worth abour $450 and are perfectly adequate for Bluray. I'd start with 4.0, then save for a quality sub. Then get a 3rd pair if you think you need a center speaker.