I have had the pricy 3rd Wave 8M for a couple weeks now, while I love the 3rd Wave, I am surprised how well Massive X stacks up to it. I would say Massive X is every bit as good as the 3rd Wave. Massive X can do allot more while the 3rd Wave has its own character and some tricks so they aren’t redundant. Where the 3rd Wave stands out: the PPG digital sound (different than aliasing), the Prophet filters with great gain structure, and import of wavetables and multi-samples. Massive has more wavetable engines, more filter options, really huge poly unison and effectively unlimited voices.
Anyhow, I just wanted to state, that in my opinion, Massive X sounds every bit as good as the 3rd Wave which goes for $2-5k! It is also really great at VA sounds, love Massive X.