Welcome, former lurker. You’re starting off with a solid list. Flipsky qc is hit or miss so I’d avoid it. Original Focboxes are tried and true, unitys are working well but have questionable future support, vesc6 is solid but expensive, or take a gamble on flipsky’s QC.
Or just wait a bit and see how the slew of new escs coming out this spring/summer perform.
Go for the biggest p pack you can fit. You won’t regret it.
Oh yeah, more inspiration but you have to pretend it’s 12s. That… was a mistake.