“best” is subjective. It is like choosing your favorite child.
I REALLY like the NExT implant for the multi functionality.
Often you can find a 2in1 “thing”, but it often doesn’t do either functiin very well, but the NExT does what it does flawlessly.
It ticks many boxes for me:
HF
NFC - NDEF
Some memory
Common chip
ISO14443A compatiblity
LF
Emulation of most LF chips; so if you come across a LF system, there is a very good possibility that the NExT will work with it.
I have an original spark in my L0 position, I really like it and would never get rid of it, I am however going to move it out of its prime location, and likely replace the L0 position with another NExT.