I have almost every kind of processor and efx at least 5 times over. Much more than I'll ever want or need.
And with the exception of the 30th Anniversary plugins and FX chains, I've never used Sonitus processors. I'm kind of hooked on iZotope products. Neutron, Nectar, and Ozone for mastering are my go-to production bundles. And now with their O8N2 or Music Production Suite, it's got everything you could possibly want or need. It was their cool UI that finally won me over (about 3 versions ago)
There are lots of other bundles or suites that are not as memory intensive as Izotope, including the Sonitus Suite.
But it always seems to come down to whatever you are most comfortable in using.
I look at this list of processors and FX that come with Sonar Platinum and often think to myself, hmm, maybe I should check that one out. There's just so much available though, and I get easily overwhelmed at the choices, along with the learning curves for the one's i haven't tried yet. So yeah, I basically stick to what I'm used to....which is Izotope products and TH3 for my guitar processing. I also have more VSTi's than I will ever use. Dozens of guitars, organs, basses, pianos, wind and string instruments, drums and percussion instruments. Enough virtual gear to fill a small warehouse if they were actual physical instruments.
But I'm like a cat with ADD, something shiny and new enters my line of vision, and I'm like "Oooh, that looks cool".
It's so hard to keep up with everything. It seems something new and revolutionary is hitting the market every week.