I seem to be drifting that way.. I have a HW 160A V4 on my KDS Agile 7.2 and a 50A V3 on my KDS Chase 360. I like the way the ESC's work so much I've just got three more (arrived today as it happens), another 160 and two 100A.
Why do i like them?..
Most gentle and smooth slow start I've experienced
Best, smoothest and easiest to use governor I've experienced
Fully programmable and firmware updateable.
The versions with BEC's have the most powerful, voltage adjustable and reliable type available (25A peak!)
Availability of HC ESC's with powerful built in BEC (only mega bucks Kontronik can match this)
V4 type have active freewheel which makes them cooler running and more efficient at part throttle.
Good pricing
Well built with tough case and built in cooling fins rather than a bit of heatshrink you get on some others!.
I've used several Castle ESC's over the years plus YGE and while these work fine the HW is better.