Actually, I don't because I have five Canon Speedlites, including the 600EX RT. However, if I were just starting my flash gear, I would seriously consider this unit sold by Adorama...
https://www.adorama.com/fplfsl360ck1...gn=LowerFunnel
The unit reminds me of my old Sunpak 120J except that it has TTL, radio triggering and high speed flash.
I really liked the 120J because of the bare bulb capability. Bare bulb is great for indoor bounce work and is also super for using with a softbox...