i have now ordered the SD2IEC
here a 95% compatibility is enough for me
for the remaining 5% I still have 3x 1541
I will part with two soon if anyone is interested.
SD2IEC compatibility with disc games is 78%, and it will not go any further. Maybe percent or two in future.
To achieve that, there's great SD2IEC collection on F64 cloud.
You can configure Kung Fu Flash cartridge to be used as Epyx Fastload cartridge - similar price, but KFF cartridge can read around 40% of all C64 disc games instantly, same goes for 99% of PRG files.
To achieve that, there's great Kung Fu Flash collection of F64 cloud.