I'd go three identical Mackie824's across the front, that puts you at $2100, enough for some small Klipsch RB (or equivalent) for surrounds.
Nowhere are performance speakers more competively priced than the small studio monitor market. These are outstanding, active (powered), contoured/EQ'd in time and freq domain speakers, that would allow the rears to be powered by the receiver. This way there's plenty of power for accurate transients, which is very important for playback of both music and movies.
Oftentimes receivers or other amps can easily be starved when attempting to deliver the big effects across multiple channels. That's a lesser concern really, these are just ideally matched, eliminating other variables, with the onboard power, crossover, EQ etc.
These are 8.75" powered two ways, that would be ideal. This way you avoid the center channel silliness using often poorly designed, poorly executed sideways speakers, when the ideal is three identical speakers across the front. The center is absolutely vital in movies. These are availed to us at ~$699, a great value. I believe Ethan Winer utilizes the smaller 6.5" version, as LCR's across the front.
Best of luck