Knowing the NAD C326BEE amp very well I'd say look at other speakers
Not sure on what music you generally listen to (this would be handy to know) byt I'd say the Dali Zensor 1's, Dali Lektor 2's and Monitor Audio BX2's would be a much better suit
Having heard the Q Acoustic 2020's a lot and demoing the Mission MX1's yesterday; the NAD amp deserves better speakers and I'd say with its weighty soundstage; the 2020's and boxy sounding MX1's wouldnt do the amp justice
If you're looking at that kind of budget, try and seek out a pair of Mission 751s secondhand. You'll find a good pair kicking round somewhere (if you're in the UK, there are some on Gumtree just now with original stands for £160 for instance). They'll probably outpace any of the above and plenty more. Just make sure it's the original model not the Freedom version. They'll work a treat with the NAD too and will withstand an upgrade when it's time to move the NAD on. They work well across all music genres too, from classical to rock/metal, jazz to classical and so on.