Listen to tbendis - though we dont always see eye to eye he knows his stuff plus hes played as Dortmund.
My advise would be:
1) Whatever you do make sure you always use instalments.
2) Your problems - initially at least are not in defence but in attack. Id either loan in sanogo and welbeck or get in a couple of dms/cms such as kara/m.diarra on a free/zezinho on a free and use gotze plus kagawa as cfs for the 2/3 months you have to wait before your cfs become fit.
My advise would be:
1) Whatever you do make sure you always use instalments.
2) Your problems - initially at least are not in defence but in attack. Id either loan in sanogo and welbeck or get in a couple of dms/cms such as kara/m.diarra on a free/zezinho on a free and use gotze plus kagawa as cfs for the 2/3 months you have to wait before your cfs become fit.
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