Reply to VSTs - What you use and why?

Hello All,

So I've been working on my production now for a little over a year and I'm finally starting to get comfortable with my setup and starting to hone in on an organized workflow (ill Gates you are a genius) The genres of music that a typically dabble in are dubstep, hard dance, and trapish experimental dubby grooves (mimosa's most recent ablum like).

Anyway to VSTs,

I own Komplete 8 and use MASSIVE and FM8 on almost all my tracks. I do have a few friends who play guitar and run their stuff through GuitarRig5 when we try to collaborate.
I will say although I'm not usually one to jump on bandwagons, MASSIVE is absolutely amazing. For subbass and mid-basses it really can't be matched.

I have a question about a particular VST synth that has caught my imagination. This synth would be iZotope's Iris. It's a sampling based re-synthesizer. Pretty much you can put samples into it then isolate certain frequencies of a particular sample and blend it with other samples and add other oscillators with them all while viewing what the sound would "look" like. It looks very intriguing and I feel I could get some very interesting soundscape type pads or weird freqed out fx. If anyone has used this synth or owns it your opinion would be greatly appreciated.

It would also to be awesome to hear about any other VSTs you use whether its effects or instruments.