Just from what I've heard, there are lots of speakers that would be better. I'm under the impression that Cambridge Soundworks is good mass market, but not really audiophile quality. (Of course, these rumors I've heard may be wrong--it wouldn't be the first time.)
I know that for a while, Wharfdale Diamond speakers were a popular choice for NAD amps. But, there are many, many other speakers that would work. For example, there's PSB. NAD partnered PSB speakers with their L40 CD player/receiver package to make the NAD music system.
The best thing to do--if you can--is to listen to many different speakers (ideally with the NAD CD player and amp) and see what you like. If you can't do that, then buy speakers that should work, priced so you take as small a loss as possible if they don't work. (You'd probably take some loss, but the learning experience would probably be worth far more than that.)
I know that for a while, Wharfdale Diamond speakers were a popular choice for NAD amps. But, there are many, many other speakers that would work. For example, there's PSB. NAD partnered PSB speakers with their L40 CD player/receiver package to make the NAD music system.
The best thing to do--if you can--is to listen to many different speakers (ideally with the NAD CD player and amp) and see what you like. If you can't do that, then buy speakers that should work, priced so you take as small a loss as possible if they don't work. (You'd probably take some loss, but the learning experience would probably be worth far more than that.)