Hi everyone, I am looking to upgrade the MK1's in my Lakland 55-01. It looks like the Bart MK5's, the Delano Drivers, and the Nordstrands are my best stock route replacement options. Can anyone with direct experience with these pickups offer any opinions on direct comparisons? I don't have experience with any of these models. Thanks! NOTE: I am replacing the stock MK1 preamp with a Delano Sonar 3 preamp.