SST Ampzilla 2000 v2 vs Son of Ampzilla II


Looking for something new to drive my Dunlavy SC-IVas and am considering SST's Ampzilla offerings. My preamp is an ARC SP3. Hoping someone with a bit more exposure to them could share what they'd consider the pros and cons of each to be and whether the 2000 monoblocks are worth the extra money.
counterreset
@counterreset : No, Ampzilla 2000 and the Son Mono's are different circuits - like the originals!
GAS offered a transformer for bridging the original Ampzilla and the Son. 600wpc and 240wpc, respectively. Into 8 ohms, of course! 
Apparently there were two versions of the SST Ampzilla. V1 and V2. The latter used the same input stage as the Son mono amps.
I just see a biamp option on the back of the new 2000 v2.

@jackd thanks for the heads up. I reached out to him and it looks like I could get better bang for my buck trade wise on a pair of Ampzilla 2000s than for the SOA2. The holidays are making it tougher to find the extra $$$ 😅.

https://static1.squarespace.com/static/5480969de4b0f0d437dda5d4/5697d38fbfe873ec75c280d7/5697d38fbfe873ec75c280d6/1425429391702/amp2000-back.jpg