Just remember 1 thing... no matter what venue you play your sound will either be through the FOH or you won't have any PA support and it will be all up to your stage amp.
If its a FOH situation (larger) then odds are you're going to have your sound taken to the board by a DI which will bypass your cabinet. If you're lucky you might get someone running sound that takes a DI and mics you but if that happens then they're probably a bass player too.
If it's not a FOH situation (smaller) then it's up to you to be heard.
Take that for what you will, if you're in a FOH just your rig is essentially a stage monitor. Since you already have a 2x10 then I suggest you consider picking up another 2x10 or maybe a 4x10. Take both cabs to gigs without FOH support and just take your 2x10 to gigs with FOH support.
Having a 2x10 and a 4x10 allows a ton of flexibility because you've got 2x10, 4x10 and 6x10 configurations available to you. Just make sure that your equipment can handle everything. I looked and I think you're 2x10 is a 4ohm cab and your head says that it can run 2ohm "limited" (not sure what that means though).