Hi, I'm pretty close to pulling the trigger on these, but have a few questions. My situation: I currently have a set of UE900s and UE TF10. The UE900s were a replacement for a failed set of RHA MA750i. I like the UEs but they're a bit thin and light on the low end. Given that I use Mac products (iPhone X and MacBook Pro) and Mac can't even standardise a connector across their own products, I'm looking to end up with three sets of headphones: one on a lightning connector for commuting, one for my desk at work, and one for my desk at home. I'm considering the Master and Dynamic MH40 and MW60, or the B&WP9 for home. Work and home will likely run through a chord mojo. The LZ A5 would be my work desk headphones. I was going to get the TF10 reshelled but everyone in the UK seems to have stopped offering that as a service My questions are: - what would I need to move up to to improve on these? I've seen people comparing them to IEMs many times their price. What would be the next major step up, in people's opinion? - Would I be better off combining the funds for these and the P9 and getting a set of multi driver customs like the UE reference, ACS Emotion, or the Spiral Ears 5 ways? I'll probably replace the cable on these with a Toxic cable, or one of those on the Ali site. Any specific recommendations there? Thanks in advance, sorry for the long post.