Since you have experience with both the humbuckers and the single coils, could you explain the difference between the two. I have a Metro UV on order and have been agonising over whether to swap out the standard humbuckers to single coils.
I swapped the HC to SC in my MV5, too.
The SC sound mellower, dirtier and more organic, whereas the HC are more polite, less mids (more scooped), less old school ....
simplified:
SC=vintage
HC=modern
I prefer the SC!