I'm NOT an AIO/Boro user, but...
IMO you should assess what your main vaping style is, MTL, RDL, DL what type of airflow/pin as appropriate THEN look at what is available. I'm sure you will find lots of opinions on what is good/bad/indifferent but if the individual who expressed the opinion doesn't mention that they vape MTL at 10 Watts with a 0.8 airpin and a narrow gauge microcoil and you like a loose MTL/RDL at 20 to 25 Watts, or they trap round wire under tiny screws and you like fused claptons you could easily be throwing large amounts of cash at stuff that won't do it for you.