I would take Guardado to stay competitive in saves. He's really heads and shoulders above the other closers available.
I would also take Roberts. He'll be a very nice 2B for you. He should be able to repeat his numbers from last year, and possibly improve on them. He's probably at or near his peak performance, and the 12th or 13th round is an excellent spot to take a 100 R, 25-30 SB guy. He'll be a nice compliment to your team, and should help you stay near the top of SB and R.