I have the varios6 as a return pump for my 120 and I use the varios4s as the pump on my skimmer. I was planning on going vectra, but went with the varios because I can control them with my apex. I've been using them for a year and I'm very happy with them.
They're quiet, easy to clean, and they start up no problem. Using delay and ramp up programming for feed modes and startup through the apex is awesome.
I personally don't think a varios2 has enough horse power to be a return for a 60 AND teeing off to suppmy one or more reactors. Id probably consider a 6. Better to have a bit much and dial it back than not enough. For reference, I run the 6 at max for my 120 and I dont tee it off to feed anything else and it's just right. I run the 4s at 62% on my ATB small cone skimmer.