I've finally made my decision on what controller to buy (3 guesses on which one

My plan is to get the RA and 2 Jabeo RW8 power heads. If I have read correctly here on the forums - I just need to purchase the heads by themselves and a power supply (no controllers needed) and 2 RA Jabeo cables?
Also - I am planning on controlling 2 mag drive pumps and have found out the hard way they do not like being turned on and off very much. Does the Relay box and/or firmware combat this how?
I've got more Qs, but lets start with those.
Thanks in advance!