Depends on many factors

Mainly I could narrow it down to
-How tall are you?
-which stem will you use (riser or flat)
-how f*cked up is your back

If you're a super short guy,read under 5'10", you should run around 8.5" and a flat stem or sligtly smaller with a riser stem

I am 5'10" and I run 9" rise with a zero rise top loader

 Alright alright Brosé. I'm 5'10", back is fine, and I have no idea what my stem is. It doesn't seem to be a rise but I'm not sure. So maybe I'll try a 9". Any brands to stay away from? Kinda just want the cheapest shit.

 @StUone7: you have a frontload stem you could do with a 9" I have the federal drop v2 which are decent salt is decent as well if anything avoid verde aaaand that's it

 Sounds good dude, thank you

 @StUone7: No problem man