Unless you just have to have Allen-Bradley, I would just as soon use the Modicon M340 (Specifically the BMX P34 2020) with three BMX AMI 0810 cards (8 isolated high speed analog inputs). While there are pros and cons to both brands of PLCs, for just the raw hardware/software cost you’ll save a mint going the M340 route over just about any Allen-Bradley solution (imho).
Yes the M340 can’t do direct tag browsing, but I created a simulation PLC using the M340 to create my base objects and it’s a simple thing to take a PLC export of the database from an M340 processor and import it back into Ignition under a tag folder.
In fact, attached is the excel spreadsheet I made to let me rapidly take an export from an M340 and import it back into ignition.