Cal Alpha upgrade

Looking at options to improve my digital source (AN CDT-2 transport and Cal Alpha dac). I'm considering a short list of an Audio Logic 24mxl or Audio Aero Prima dac (and I suppose possibly an AN dac). But I guess I've also got the option of going the one box Capitole route. Am using a Music First TVC passive pre, so I don't think I'll be using the analog inputs on a Capitole. Does it all depend on how good the AN transport is compared to that on the Capitole? Any advice or comments appreciated