Although you need to avoid overly bright sounding kit, you also want something with some clarity and, for me, this is where NAD can fall down, although the C326BEE is a very capable amplifier, if slightly on the soft side in the bass.
Marantz and Denon both tend to work well for classical music and either the PM/CD6004 or PMA/DCD720AE ranges (respectively) would be a good buy. You might also want to consider the Pioneer A30. If you can go that bit further to the Rega Brio-R it is very worthwhile, but not the end of the world if you can't.
For speakers I favour a small number of brands that don't seem to subscribe to the fast, boomy, screechy, sucked-out midrange type of sound. I'd recommend hearing speakers from Q Acoustics, Dali, Wharfedale and KEF. The new Dali Zensor 3s are well worth the extra cost and size over the Zensor 1s as they offer much more depth of sound but without any flabbiness or boom, and they share the wonderful imaging abilities of the smaller model. If you want a smaller speaker the Q Acoustics 2020i are excellent and work well with Denon or Marantz. The Wharfedale Diamond 121s sound very nice with a bit more bass depth than the Qs, but they aren't as cohesive or involving as the Zensor 3s. Personally I would avoid the Monitor Audio BX2 as they can sound very clinical and thin, and I'd definitely avoid the B&W 686, which are very bassy sounding in an un-natural way. KEF Q100s are lovely and work well with Marantz and Denon. The Q300s are also nice but in my experience they need quite a bit of space to be convincing - in most domestic spaces I feel the Q100s are the better choice.
Make sure you budget for speaker stands. Good solid support makes a huge difference to most speakers. Also don't forget to budget for some decent cables. You don't need to go mad but something like mid-range QED stuff will help to make the most of your set-up. Be careful with Chord Carnival Silverscreen speaker cable as it tends to bloat the bottom end and sound a bit too soft overall.