In that case you should take a look at studio nearfield monitors, in this price range you can usually get 2-way active monitors (ie one amplifier per driver), they are usually very accurate and manufacturers provide ample specifications. If you look at HIFI speakers (new, second hand is another market), you are usually not going to find the same quality at this price. Besides, the bookshelf form factor allows you to easily place them in the room.
At this price point some of the popular models are K+H o120, Adam A5X, A7X or the Focal CMS range. All those speakers also have a dedicated subwoofer in their range if you decide to upgrade later, for example if you have a larger room but I believe the bass level should already be satisfactory.
Also bear in mind that the sound of the speakers is VERY highly dependent on the room/speaker interactions, namely the different bass resonances that may appear, how treble absorbing you room is, how long it takes for the sound reflections to attenuate and plenty of other factors... It's by far the larger impact of what your speakers will sound like, far beyond the amplifier or the source (provided the ones you use are functioning in normal conditions). Take care of the positioning of the speakers, and ask for advice regarding to acoustically improve you room if necessary.
