If you're using them as rear surrounds, you shouldn't have to spend anywhere near $300. If they are going to be your main speakers, and you want a great sounding monitor cheap, the Danny Ritchie designed WAF-1 are clearanced at Tweak City Audio for half your budget. Danny also has some X-LS encores that he will be getting soon, and those are some great monitors, but larger than the WAF-1's.
Good luck in your search.