It's already been said but I would agree with
#1 accoustic treatments (Corners and first order reflection points) and speaker positioning are probably the cheapest upgrades!
#2 Agree with Albert that cabling is not going to fix the problem... The MIT cables aren't the problem, if anything they would open up the top end and add detail.
#3 Vandys are great speakers for the money that provide a very musical presentation. But they lack the detailed pinpoint imaging compared to much more expensive speakers.
Start saving for speakers! Determine what you liked about your headphone setup and start listening to new speakers (ideally take them home for a demo).
#1 accoustic treatments (Corners and first order reflection points) and speaker positioning are probably the cheapest upgrades!
#2 Agree with Albert that cabling is not going to fix the problem... The MIT cables aren't the problem, if anything they would open up the top end and add detail.
#3 Vandys are great speakers for the money that provide a very musical presentation. But they lack the detailed pinpoint imaging compared to much more expensive speakers.
Start saving for speakers! Determine what you liked about your headphone setup and start listening to new speakers (ideally take them home for a demo).