I think if we got £35m or more for Torres then yes as he is constantly injuired.
As for Gerrard i think it is to late to get much more than £15m for him so i would keep him.
I would value Reina at £25m and there are a number of keeper's who could replace him such as Neuer or Lloris.
So in total you would get around £70-£80m max for the three players
So you would struggle to find that quality for that money so i would soon'er get rid of Babell,cole,Degen,Poullsen,Insua,Maxi,Konchesky and buy young player's to play along side of our big three.