You'll want some near-field monitors. I just bought a pair of Emotiva Airmotiv 5 and they are excellent near-field monitors. I use them strictly for computer audio so they are powered. They hit 99 dB with PC volume at 70% sitting 3 feet away. They are ported in the back, so they can't go flush against a wall. They DO have 2dB and 4dB trim on the low frequency to keep the bass from "booming." Might need a pair of wall mounts from eBay seller FourPair or the ones from Displays2Go. Pinpoint AM40's are $80 and look similar to the ones at Displays2Go for $55. Two of the FourPair mounts are $50 but the pivot point is where the arm meets the wall and are harder to keep from sliding down on their own. Have to REALLY tighten the screws once your tilt angle is set.
Maybe some monitors with front ports, like the Adam A3x or A5x. These are slightly over your budget but they can be seen and heard at B&M's, like Guitar Center. Also KRK or Behringer.
As far as non-powered speakers go, in addition to those already mentioned, I usually recommend taking a look at the Definitive Technology Studio Monitors. Newegg has good deals on the SM350 and SM450. Also take a look at the Polk Monitors, 30 II, 35B, 40 II, or 45B. The Polks are under $200.
If you are looking at the Polk RTI A1 or A3, then the Definitive Technology SM450 for $280 a pair at Newegg are definitely worth a look. I don't think you can beat that deal on performance vs. cost. I seriously doubt you'll even need a sub with the SM450's IF you can give them 200 watts a piece.
Denon AVR X7200WA, Emotiva XPR-5, Emotiva XPA-7, Sony XBR 75" 850C, Oppo BDP-103D, Roku 4.
DefTech BP7000SC (L/R), CLR3000 (C), SM55 (FH), UIW BPZ/A (SB), UIW 75 (TM).
JBL L7 (Sur), EoSone RSR 350 (RH).
PC 2.1 setup. Emotiva Stealth 6, SVS SB2000 sub, Emotiva DC-1 DAC.