What

? I think both will be very good players, but ATM Lukaku is ahead of Feruz in development, which I'd expect seeming there's a 2 year difference.
Apparently Valencia have ruled themselves out of signing vdW because they aren't willing to pay what Ajax want.
Maybe we'll look at him again. I'd have him; this year he's been out a while with an injury, but he's proved that he's a good player, and he still has time to improve himself.
I'd go for either vdW or Azpilicueta definitely this summer, and then rotate with Brana. Obviously there are others I would take, but those two would probably be top of my (realistic) list. Diekmeier is also someone
I'd consider, but I feel he needs to carry on for a couple more seasons playing every week before being ready for a big move, still has a way to go to reach his potential.
There's also Debuchy who is proving himself as a good right back;
I watch him every week with Lille and I think he would do well for us. I'd probably lean more towards vdW/Azpi though, mostly because of them being younger, but at 26 Debuchy is a very good age.