SPs: Pick two - Arrieta, Garza, Floyd

[the dresden]

Adding Beachy to my roster this week and need to dump one of my current SPs for him.
The three that are on the chopping block are Gavin Floyd, Matt Garza and Jake Arrieta.
Which two do you like for the rest of the season?

Full pitching corps:
SP: Halladay, Shields, Kennedy, Hanson, Billingsley, Wolf, Hellickson, Danks (DL), Floyd, Garza, Arrieta
RP: Perez, Axford, Venters

This is for a 10 team H2H league