I disagree that he is very good. He is good and our best CB, but far from very good (by very good I mean a CB who is good enough to play for Barca/Bayern/Madrid). In fact, pretty much every top club have 2 CB who are better than him, but for sure have one CB who is better than him and one comparable to him. Like
Madrid: Ramos, Pepe, Varane
Barca: Pique, Mascherano
Atletico: Godin, Gimenez, Miranda
Bayern: Boateng, Benatia, Dante
Juventus: Chiellini, Bonucci, Barzagli
PSG: Thiago, Luiz, Marquinhos
Chelsea: Terry, Cahill
City: Demichelis, Kompany
Arsenal: Koscielny, Mertesacker
Players in bold IMO are better than him, while players in italics are at around the same level. All of them are better than Jones/Rojo/Evans.
For that, I think that a top CB must be our absolute priority this summer.
Obviously, that doesn't mean that we should neglect signing a Carrick's replacement, and Schneiderlin is as good as we can get.
This doesn't work this way. Terry couldn't play for us, Barca and Bayern so comparing him to any of our defenders doesn't make sense. Even Jones and Rojo are better for us compared to Terry. He wouldn't improve us at all. It should be clear why.
Luiz and Marquinhos are not even comparable to him, especially Luiz who is a joke and it can be seen when he has to be the leader of the defense (we have seen that at WC), while it is different when he has some like Thiago next to him (imagine Luiz being the leader and having to cover a lot for his RB, something Smalling had to do a lot this season and it was Smallings first regular season after few years, he should become only better). Marquinos is still to young so I am not holding it against him, but he needs time.
When it comes to Pepe and Ramos, here was a post from a Real Madrid fan who wrote the same what I think about Ramos (and he mentioned Pepe to - what worries me a lot are set pieces as he just isn't really good at that, while we don't have a goalkeeper who really helps when it comes to that, so defenders would have to clear it out), but yes in the system we play he would probably be a very good signing for us (but I don't think he would be a good signing for SAF, if he kept the same system, something where Smalling fits better). Him and Smalling should be a very good partnership in this system, as bot of them are quick, very good in on on one situations even with lots of space around them, while Ramos could start our attacks and Smalling could deal with the more dangerous headers in opponents team. I still don't think Ramos is worth some huge money, or that he is really good when it comes to pure defending (I do remember what people thought of him not very long ago), but as I've said at the beginning of my post, we can't look at these things that way.
Godin, there is not much to say, of course, while Miranda left I think
, Thigao also, I agree, even if I think that he looses a to many headers (but maybe I watched the wrong games), but overall of course great defender.
I haven't seen a lot from Juve and when I was watching I didn't really concentrate on their defenders, but hey, they are Italian, must be good
.