Defence Option A vs Option B?

[mjbur13]

Alright so which one out of these 2 do you reckon is a better backline:

Option A: Laird, Kolodjashni, Yeo, Cutler, Weitering, Dea (Byrne-Jones, Hartley) + 80k

OPTION B: Laird, Kolodjashni, Yeo, Birchall, Dea, Byrne-Jones (Broad, Hartley)

Ofcourse rookies subject to change!
My main concerns with option A, is the lack of a 4th premium (Birchall), but in saying that will the cash generation from Cutler, Dea, Weitering and other rookies be worth only having really 2.75 premium Defenders (Yeo is only about 75% premo atm, still needs to prove his worth).

Also looking at it as Birchall, Dea, Byrne-Jones vs Cutler, Weiterung and Dea...I'd say for round one and beyond the scoring output would be similar, plus cash generation plus the 80k extra, is why Im leaning towards option A.
What are your thoughts?