I like EMG's in Les Paul's, I think the 81 may be to bright in a bolt on basswood/alder guitar. Maybe the 85 is the solution for those guitars. I have been running EMG's 81-85 in a Les Paul Axcess. I am way happy with the sound. I have a MKV so I think the results would be similar with the IV. The trick I have found is in the adjustment height. If I swap out to a guitar with passives it takes a few minutes for my ears to adjust to the difference. EMG's are compressed but also tight, sort of like running a TS9 with the level up and drive down. I am still learning with the V, as it's somwhat new to me. But I think they are worth a try. Some love em' some hate em'. Try a guitar out similar to yours, through a similar amp, then switch guitars to a passive design. Pinch harmonics are effortless with EMG's that's for sure.