Nice, Simon!
Things I did notice:[list]
[*]the difference between passive and active MK1's is more noticeable than the difference between active/passive Barts
[*]the MK1's are not highly regarded (on TB), but they sound like fine single coils to me
[*]the Barts are not better, but different. Warmer, growly indeed
[/list]
I also own a (stock) Lakland 55-01. And I like the Barts a lot. Not sure if I am convinced enough to invest a large sum of money.