He is mahal but good and stands behind his work. Any issues that crops up , u can go back and he wont lepas tangan. But go to him if u want technicality, music appreciation and finesse. Cables he use is above average but not crazy expensive. If u want higher price also can but he will tell u try first. He has demo cars u can listen to. Go focal bro. Blam is okay but focal is close to true tone sounds doesnt cut wires.
Go to kk lau if u like a lot of custom jobs, great kick ass head banging bass install. Cables also can be cheap or high. Generally doesnt cut wires
Monster audio, chong is okay but he always uses mosconi stuffs and bloody mahal. Cable cable all kayangan level which increases ur price. Doesnt cut wires
Quest audiio u go to for sony, pioneer and off the market shelves and those super mahal cables but i think he pivoted to massaage parlours now. Used to cut wires
Brothers nesr ldp, still does cheap isntalls but omg! Potong wire, splice and smallest thin wires. But they are cheap. Used to Cut wires.

If ure into high resolution audio then try get dynavin as i know it has the audio chipset that can be used with this app usb audio player pro which allows 92kHz output. All android phond and okayers and locked to 48kHz.
If u dont want to change ur whole system then just get a simple dsp and use ur own spealers and use for a month.

If u like instrumental and technicality. Focal is ur best bang for the buck. Suren got other higher end speakers but its really a fight between 90% to 91%. Just got for a good dsp first. Dont change ur speakers. Later u can change ur speakers.