I own the NAD C370 and Audience 52's, connected at a previous time with Monster speaker cables and driven by an old Marantz CC48 changer. I ended up with the amp after trying the NAD C350 (and my old NAD 320). A few observations.
1. The Dynaudios, like most Dynaudios, have an upper-mid and treble forwardness. See
Audience 40,
Audience 50,
Audience 62,
Contour 1.3 Mk.II, and other places. But they are not as bright as some speakers I know! I bought them precisely because they had a sweet treble and that slight forwardness, lending extra life to female vocals, strings, and such. The Tituses are going to be more laid back in that region, but have a stronger treble. If you didn't like the Dynaudio's treble, I'm going to guess the Tituses will be over the top for you.
2. Neither NAD (C350 nor C370) is bright, but they may come across as dry. This may accentuate treble problems further up the line, as in your CD player.
3. Different CD players make a great difference, but not enough to completely "solve" the 52's forwardness (I didn't want to remove it entirely, anyway). My MSB DAC smooths the harshness of the Marantz. My portables are all smoother and less harsh in the treble, but they are also less dynamic, one of the great attributes of the 52's. The point is that the 52's are so revealing in the treble that you must have absolutely smooth sources.
4. Cables can help with smoothing out harshness, but will not flatten frequency anomalies like the Dynaudio's forwardness.
As always, changing the speakers will make the greatest difference. It's what I would have done if I didn't have trouble finding something else even near the 52's price range that had the same dynamics, detail, and neutrality. I understood that the first was at the expense of the last, but at this price, you MUST compromise somewhere. Alternatively, you can accept the Dynaudio's "liveliness" and attempt to lessen its overt effects through smoother CD players (or DACs), amps, and cables. This is the route I intend to take when I upgrade.
Hope that helps. Good luck!