I didn't compare Naim CD 5i and CA side by side. So I am a bit precousuos. My feeling is that small Naim has excellent dynamic and is very strong in bass compartment. I listened to the system: Naim CD 5i + Naim Nait 5 + Ruark Sabre III and it was sounding vivid, fast, ... excellent for the money.
What I did compare side by side were: Naim CD 5i and Naim CD 5x. 5x is better, especially in the bass area - the bass of CD 5x is more precise. You simply hear more details and it is a bit more open. Whether it is worth additonal 1000 euros is a matter for discussion but if you have that cach, go for 5x. Later you can upgrade with external supply, which is not possible with the small one. But before you do this supply upgrade, try it first. I did try Naim Flatcap 2x but I couldn't hear much difference. Many people did though, so be a bit carefull with that additional 1000 euro (or something like that).
I hope this helps a bit ...
Regards
Dejan
What I did compare side by side were: Naim CD 5i and Naim CD 5x. 5x is better, especially in the bass area - the bass of CD 5x is more precise. You simply hear more details and it is a bit more open. Whether it is worth additonal 1000 euros is a matter for discussion but if you have that cach, go for 5x. Later you can upgrade with external supply, which is not possible with the small one. But before you do this supply upgrade, try it first. I did try Naim Flatcap 2x but I couldn't hear much difference. Many people did though, so be a bit carefull with that additional 1000 euro (or something like that).
I hope this helps a bit ...
Regards
Dejan