You have a good list of lights going! I have a D4V2 W2 (not a d4sv2) and it’s amazing. I can only imagine the d4sv2 W2. 

I’m sure the DT8 SST20 mix will be great, as others have reported. And the sc700d is one of my favorites. 

But, I’d have to say I’d vote for the D18 sw45k or the sc64w HI. Both of those have emitters that have been discontinued. Grab them while you still can. I believe the SC64w HI will move to the XHP35.2, which would be great, but what if they just discontinued that model altogether?