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.
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@kw6 : That I can't say! Either of these new versions made by SST are sonically competitive with today's expensive amps (no need to mention names here!). 
Contact Walter at Underwood HiFi as he was offering a great price on the Son of Ampzilla Mk II.  He has been in the business over 40 years and I am sure he has encountered many pairs of Dunlavy's over the years.  
@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!