Hey there-
What about Naim SBL's? I have a Hicapped CD3.5 that sounds amazing through the SBL's. Of course, it also sounds great through my KEF 104/2's. If you're looking for a monitor-type speaker, the older Tannoys, such as the Devons, sound excellent, or the Altec Segovias, if you are able to find a pair. All these speakers are efficient enough to work well with a Nait 5. IMHO, unless you have a RTA and a lot of time and money to spend on room treatment as well as not much concern where you might ultimately have to put the thing for best sound, subs aren't the answer.