Those KZ10s are an awesome starter set that for me nothing felt like an upgrade till I hit the $500 range with my CFA Mammoth. I do suggest picking up some foam tips as they isolate/fit better but I have funky ears due to years of wrestling.
I also own the lokious, it’s pretty darn good for on the fly eq changes. One thing I’ve noticed is it will definitely over drive some of my amps when balanced, but that might also be because of pairing it with a D90.
I can also vouche for the singxer. It’s clear, engaging and smooth sounding. It reminds me of THX amps but so much smoother and not a hint of compression on the top end.
For foams I mostly use dekoni but I have recently switched to final audio Eseries tips since the have more sizing options. I broke the cartilage in the out flap of my ear(tregis???) So having multiple sizes helps me fine tune for seal purposes.