You won't likely find loud active speakers at that price. The CD/receiver you have is pretty good and should power most speaker arrays to very respectable levels in a nearfield environment. I personally am using Infinity IL10s on my CR-H220 (the same cd/receiver as yours, the MD-X220 is the model for the system w/speakers). The CD/receiver doesn't get over exerted. I might recommend something in your price range from Polk Audio or Klipsch possibly. You may want more efficient and easier to drive speakers (something rated 90db@1w/1m and 8 ohms nominal).
Those Engergys are small, but a subwoofer would fill those out nicely. I was using a small pair of Boston Acoustics CR57s paired with a subwoofer with the CR-H220 and the results where possibly all around better than the Infinitys. I just use the Infinitys because I don't know where else to put them at the moment.
Dayton makes some very cost effective 10" and 12" subwoofers you might look into one of those to pair with the Energys.
Also, see my review of the CR-H220 below if you want to get someone else's impressions of the unit.