I actually like the smaller S400 turbine and housings versus the big 96 wheel and 1.32 housings...it's just too lazy for me anymore. If you don't have huger RPM, or don't spray, I just don't see the need for the bigger wheel and housing...and you can squeeze some more out of the little ones with a good wastegate...
I'll be building a twinset with the help of ED for some chargers...60/65/12 over a 78/83/1.10...goal is 600hp towing on fuel, more than that I'll be happy. I've also built a set using a 57/65/14 over a 78/83/1.10 and they spool wicked fast on a little VE pumped truck, and run VERY clean for a VE.
I can't wait for Chris to let me know my chargers shipped...since I think I hurt my VGT I've been testing
Chris