Woot! Finally got 1000 solo Protoss wins and completed the Solo Zen Master achievement, almost 6 years after the release of Starcraft 2. Starcraft 2: Wings of Liberty was released on July 27th, 2010. Guess I really took my time to get this achievement eh? This unlocked the Dark Voice portrait and the use of the Solo Zen Master achievement icon (which was what I was after all along).
Solo Zen Master achieved!
Profile snapshot before the final win
Profile snapshot after the final win
This Solo Zen Master achievement icon is the real deal =)