How far are you sitting from the DS4.5? They are designed to be listened to right in the nearfield ie. on a desk as computer speakers. I have mine setup like this and I think they are completely great.
If you are sitting a few feet away from them, then they are not the right speaker.
Try some of the bigger era/Peachtree speakers, like the era 4 or 5. I have the 4s in my bedroom and they are great
Audience ClairAudient speakers are among the best imagers (and music makers) available. They're remarkable. The new Audience The One speaker is a very small monitor with big sound: 7x6x5.5" with a single proprietary 3" driver and a passive radiator. But don't discount the size if you want true transparency, dynamics, and musicality. It's not up on the Audienc-av website, yet, but you can call them. The One apparently made a big splash at CES. Check Greg Weaver's CES report on Positive-Feedback; he called The One "truly stunning." Don't overlook this One!
For a room that small, and with imaging high on your values, I recommend something with a near-ideal point-source plus a small powered subwoofer to match bass output to a rather small room. Two great candidates are the:
Gallo Nucleus Micro satellites mated to one of their outstanding powered subwoofers or a
Mirage Omnisat trio such as the Omnisat 3 FS (floorstanding model) plus MM-8 sub, an unobtrusive 9" cube.
Both of these sat/sub combos have stunning transparency and imaging. The Gallo favors holographic imaging while the Mirage presents a sit-or-stand-anywhere realistic stable soundstage. The Mirage also has great dynamic capabilities and would scale up well to a larger room. Either sat/sub combo will be an easy load on your Peachtree and your wallet, and present true high end sound with excellent imaging and/or soundstaging.