Who to jump off? McPhee or Sinclair? (SuperCoach)

[SJ]

Going to downgrade a defender for Jesse W. Smith.

I have:
Chad Cornes
Lindsay Gilbee
Jed Adcock
Adam McPhee
Andrew Carrazzo
Jess Sinclair
Grant Birchall
---
Tim Boyle
Lachlan Hansen

McPhee is losing points every week, while Sinclair has lost value this year but has been more consistent. Ideas? Or is it time to 'cash in' Birchall?