Nuhrayoh, Trust me on this one.. If this is your FIRST RBA you do NOT want to go with that AGI.. The RSST is much better, That AGI can be a PITA for someone who is new, Hell i even had hard times with it.. The RSST is a awesome RBA, Its built great and very easy to setup.. The only drawback is if you use pluid type juices, it will eat the tank.. if you dont though, they no worries.
Go with the RSST, Take my word on this one. Coming from someone who is still in the learning process also, The RSST is much better when it comes being easy to build. The 2-1 RDA/RBA thing is garabge if you ask me.. If you want to drip, then get a RBA.. If you want a tank, get a RDA.. The 2 in 1 thing CAN be headaches for someone new.