There are (or were when I last looked; it's been quite a while) some very decent soundcards from the likes of RME. There is probably no need to go for an ADI-2 Pro. But it might be a good idea. My view is that you should have a playback system that you enjoy listening to. You then capture that sound with an ADC. Integrated DAC/ADC is a good idea. You are going to be doing a lot of recording/playing/comparing.