Speaker recommendations for NAD

I run an NAD C325BEE with KEF bookshelf speakers, which use a front port, and for a while had my gear set up in a layout very similar to what you describe. They worked great. My listening tastes run much the same as yours, and I find KEF speakers do well where it counts: female vocal and pianos sound spot-on, so just about everything else does, too. A bonus is that because of their Uni-Q driver (the tweeter is mounted in the center of the woofer) they image extremely well even with non-ideal placement. I find them a bit less forward than Epos and B&W, and I like that about them.

Mine are the Q15, an old model, but I've heard newer models higher in the range--excellent. Their iQ3 runs about $500 online and the XQ1 (in a higher tier) runs $800-$1000. The iQ9, though it's a floorstander, has lately gotten some rave reviews, and the bookshelf models are cut from the same cloth. If you can find older KEF Reference series models on Audiogon or elsewhere, they're wonderful.

Regarding the C325BEE vs the C352: though I own the C325BEE and don't listen particularly loud, I've owned more powerful amps (100 watt Jolida and Marantz) and know what I'm missing in terms of headroom and, to some extent, low end frequency extension. The C325BEE keeps up pretty well, but its bass is lacking. Unfortunately I wasn't able to audition the C352, but I understand it does have a bit more oomph and that its sound is a bit more neutral than the C325BEE, which has some (largely pleasing) coloration (previous NAD amps I've owned suggest this assessment of the 352 is probably true). Mine was a budgetary call, and I do think NADs are a strong value no matter how you cut it. If you can swing the C352, it might be the more lasting value.