As usual, I'm confused. I have just had an email from Zapp giving a discount to previous customers, so I'm looking to get the drivers and motion controller for my new machine. I think I'm going for the CSMIO-IP/M, despite its lack of slave axis homing, as I can work around this and everything else about it ticks the boxes. The PLCM-E3 looks good (and does dual-axis homing, I believe) but add in a breakout board and it's getting on for the same price, 5V not 24V, etc.

However, I need to update my old analogue drivers that I am currently using to get the advantages of digital control, resonance reduction, stall detect, and so on, especially as I'm going dual-motors. Zapp have the AM882 and EM806 available. Reading through the specs, I can't see much difference between them (and they are the same price). I really don't want to get the one that is going to be obsolete a month after I buy it (again...)

Which is best, and why?