Need new brakes advice

Hi, I have a 2016 s-works enduro and it has sram guide rs 4pot brakes. They are horrible. The back brake lever is super stiff and has no feel whatsoever and is inconsistent and sticky and the front brake has basically no friction and the pistons are sticky, the lever is spongey and it needs a bleed but I can't bleed it because the bit broke in the bleed port. I need advice on new brakes. I have shimano slx 4 pot's with resin pads on my ebike which I like a bit but my favorite feeling brakes are the 2 pot avid brakes on my old bike and my mums bike. The braking is soo good and they have great feeling/modulation. I need advice on new brakes. I want 4 pot brakes and I am on a budget, I also like to have a lot of braking power but I like good modulation and feel and I'll probably get metallic pads (because i think thats what was on the avid brakes. I was thinking of something like sram db8, trp trail evo or shimano deore m6120 or something else. I need advice on some brakes that would be right for me. I would like to keep it under $200aud. thanks for your help.

UPDATE: I was considering magura brakes but they seem to be hit or miss although when they are working they sound like exactly what I want. I was considering the magura mt5/mt trail sport but I am a bit put off by the reliability, inconsistency and bleeding issues.
I am strongly considering shimano deore m6120, I have the 4 piston slx on my ebike and they are decent brakes. Not quite what I want but they seem to be the best I can get in my $250 budget. I have also considered sram codes but I dont really know much about them. Any advice and recommendations are much appreciated.