First, soundstage is never going to be maximum potential with the Nait. Naim has other fish to fry, the taste of which you know and love. Second, the narrowness of your room precludes full potential of soundstaging characteristics. I'm not familiar with your Ninkas, but, because of the above, you may find that changing speakers doesn't appreciably increase your soundstage enjoyment. That said, I've used ProAc speakers with Naim electronics for many years with wonderful results. There's a used pair of D15s on Audiogon now for $2K, though their footprint may be a mite wide for your specification. The 1sc and Tablette 50 Signature both do a startling disappearing act and, to my ears, are better than the newer Reference Tablettes. Unfortunately, they don't turn up used often. In fact, in the case of the Tab Sigs (truly magical little devils), they virtually never show up.