I have found that all things matter when it comes to soundstage. A better preamp, amp, integrated, speakers, room setup, and yes, even cables help. I have cheap source and middle of the road everything else and I have a huge soundstage. For me room setup and speaker setup made the biggest difference. Wife aloud me to put up some sound absorbing panels and move the speakers four feet (from the front) out into the room and bang, everything came together.
All the best.