For charge function, ProTrak is the best.
Since the new ProTrak 30 already had 30 A discharge capacity and more high-tech features (you can read each cell info when discharging and link it to comp), the best discharge function is now not exclusively own by Turbo35.
For durability, Turbo35 is No.1. You can cycle 6 packs without rest on it.
I will go for Protrak 30 !!!