I see some information not mentioned about mAh rating on cells
Dont get caught up on mAh / capacity
One important thing to remember, as with most things in life, there is no free lunch. For a higher capacity (mAh) there will always be a tradeoff. For these cells that tradeoff is generally discharge rate. Batteries with higher mAh generally have an higher internal resistance, and cant deliver the same current as a similar cell with a smaller mAh rating.
The AW IMR 1600mAh vs 2000mAh is an excellent example of that. The 1600mah cell has a higher discharge rate vs the 2000 has higher capacity with a smaller discharge rate.
Selection is best suited to application, if you know you dont NEED the higher discharge rate, you can select a cell with a higher capacity or vise versa.
In regards to all the fuss about protected cells
Personally I use protected and unprotected cells, because I have an excellent understanding of battery tech. If you dont, stick to safer chemistry cells. As long as you dont exceed the max discharge rate of a protected LiCo cell, you can use it. The main reason I use them is for VV/VW APVs in stacked battery configuration. I find its safer than using non protected IMRs. This has been common practice in stacked cell high end flashlight forums for years
The more you know. I guess the warning just gets thrown out for the noobs so they dont blow their hand off.
In terms of brand
I love my AW cells, Panasonic, and the 30A high current discharge Sony cells for my mech mods. I use them for my regulated PVs once in a while when I need cells capable of a very fast charge rate when I travel and dont have time to wait.
Edit Note: If you do stack cells, use a balance charger. I use a couple different hobby chargers typically used for RC battery charging. Keep and use cells as married pairs.