Unlucky in the FA Cup Final mate, absolutely gutting but a close game.
As for the job dilemma, I'd say stay it out at Sunderland, your cup run has already proved the squad you've got are capable of competing with the Prem boys and with the financial work you've done over the last two seasons it'd be a shame to see it wasted so early on.
Stay at Sunderland.
You're onto one of those FM saves that you'll look back on in years and be like ''damn that was awesome''.
Congrats on promotion