While I agree that Factorizaton alone should suffice, it is always good to have more choices. And in this case, I would use the JABBA as well as Factorization. I really like the dolly for it makes relocation easy, just up and go. Instead of having to either break the barrel and have a major spill to clean up or make new barrels and transfer them via your sorting network.
Also, the upgrading process is also much more gradual unlike the dark iron requirement, which not only requires tnt, diamonds as well as making a craftpacket stamper and also coupled with the need for ender pearls, which makes it a pretty late game option for upgrading.
The top input and bottom output only mechanism compared to JABBA's also makes it a slightly inferior choice (talking about barrels only, I love the router.)
But all in all, this is just my own opinion. (Nowadays you need this disclaimer. )
Also, the upgrading process is also much more gradual unlike the dark iron requirement, which not only requires tnt, diamonds as well as making a craftpacket stamper and also coupled with the need for ender pearls, which makes it a pretty late game option for upgrading.
The top input and bottom output only mechanism compared to JABBA's also makes it a slightly inferior choice (talking about barrels only, I love the router.)
But all in all, this is just my own opinion. (Nowadays you need this disclaimer. )