I had things narrowed down to either HOWE or the WH full setup (4x4x2 box, HV pump, and ram assist) earlier in the year. I ended up going with the WH setup simply because it was about $800 less and I did not have an opportunity to mark, pull, & ship my OEM box back to Howe ... But I'm no racer here. Just trail, sand dunes, and street use. Be aware, you may want to add some type of fluid cooler to the WH setup as it is not part of the "package" when I bought mine. I've only had the EB on the street between the house and a couple of shops since the install so far but it's road manners are night and day different from the OEM power steering setup. Can't wait to get it dirty!
When I was looking closely at things I had seen more then a few times where guys were having some issues with the PSC pump setup squealing and leaking. The pumps were only lasting 6-18 months before needing a complete rebuild. I could never find why or how in any of the threads but reading the frustration the owners were having I decided to steer clear of PSC. Although there are quite of few HAPPY PSC owners running around.
Not sure I've helped but there some .05 advice worth maybe a .01...
