Well, John (AKA Vir Unis) holds the keys to the recording we did where I was using the H8000 as my only effects processor.
As far as time goes, its not that I don't have time for you Immersion, but alas I don't
I just came off a month of 60hr work weeks filled with sessions (Celtic/Indie Rock/Folk) and now I am off for the next few weeks to be with my wife who just had a baby (yes there are now 3 Vnuk boys), so time in the studio is rare.
I can tell you that in traditional music styles I still stand by my original opinions and this is after using both the Lexicon PCM 96 Surround and the H8000FW, the reverbs in the Lexicon are way more to my taste for warm and lush. The reverbs alone in the Eventide are a bit crisper and aggressive. Great for percussive and drum rooms as well as vocal plates and such, however the PCM 96 was the better choice on violin, acoustic guitar and also vocals.
As a sound design machine for weirdness, the H8000 is flat out untouchable and if I could only keep one it would be the Eventide for everything it does in addition to reverb, but as a reverb only box, the PCM 96 has only one competitor on the market and the is the Bricasti. The reality is at this price range ($4000 - $5500) neither unit sucks, its really like arguing fine vintage wines or high end sports cars, its all about personal taste, style and what you can afford.
As a fellow on gear slutz says...your mileage may vary.