I explored moving from my Pass XP-22 and XA-60.5s to the INT 60. (I also have the XP-17 phono stage.)
So, I reached out to Kent @Pass for his thoughts. (I've know him for a quite while.) He basically said it could be viable but in terms of sonic bliss, body and weight the integrated wouldn't match those separates. So, I decided to keep 'em separated.
I think, like most of this stuff, it really depends on the room, your speakers and the rest of your gear.
However if I were just starting out, I would go the integrated route and build around it. We can debate whether they equal separates in terms of sonics, but they can certainly be more economical.