Good for you for getting into some single ply lifting.
Regarding gear choices - I too always lift in titan gear. But, I would say someone with a 1000lb total a super katana is setting yourself up for failure. I think a super centurion is more reasonable, but go for an F6 as your first shirt. SuperK is just way too frustrating as a first shirt.
PS: Briefs are not legal in the IPF/USAPL. Just train in suit bottoms if you don't wait straps up. No point in briefs.