Suggest von Schweikert VR-2's..fits your criteria but has a bottom end.
NHT 2.5i is killer.
The 3.3's are for sale right now as well.
Set up properly (according to the manual) they would both take up about the same amount of space. The 2.5 should be off of the wall by around 14 inches while the 3.3 (a much deeper speaker) should be placed against the wall. Neither of these are the last word in hi-fi, but either would be a step up from the Supper Two (great speaker) while maintaining the same black piano gloss finish and a slim profile.