One problem with that spreadsheet - Viciedo isn't going to his first arb until next offseason.
He will get a decent bump in salary, though, surely over $3M.
Here's last year's numbers for example so you can fill in some of the blanks:
If Beckham goes to arb, he'll get well over his last year's figure of $2,925,000
Also, De Aza will get a bump up on his 2013 salary of $2,075,000
So if we keep all three, the total payroll would be up to around $70-75M.
Adding in the near minimum players to make up a 25 man roster, we're at $75-85M.
I'd think that leaves room for another mid-tier FA signing.