cb: Wahlquist (also plays at rb) or Sviatchenko (both achievable within your budget if you use instalments).
cf: Try loaning somebody in such as Wilson from Utd (or look at other loan listed players).
I would also urge you to buy VIEUX SANE (he's only around 200k yet his stats and performances are comparable to players costing 100 times as much).
Look also at: Jesus Marimon/Jhon Arango/Cazares (would be a real catch for 600k or free if you manage to get him) and especially Adam Vass (who are all extremely cheap).
Also, being Danish, monitor Christiansen from Chelsea to loan him in as soon as he returns to them. You can extend the loan to cover 2 seasons if not 3 and if you re lucky he wont renew with Chelsea while you have him so you ll buy him for free).
Monitor also: Helenius and Cornelius.