I'm really 50/50 on Maguire, the money being talked about is madness, would personally not value him over 60m but that's just me, if were talking about 80/90m then why not just pay the extra 10m and go all out for Koulibaly.
Also, (not seen much of him maybe 2/3 games for Portugal) but that Ruben Dias looked very good, classy on the ball, strong in the air, quick, reads the game well and I think his buyout is €53M, which seems like a far cheaper option than 80m for Maguire, but as I say only seen that Dias a handful of times so not enough to see how good he is consistently.
Pros for Maguire, great in the air, leader, dominating, brings the ball out of defence very well, good passing, massive threat from set pieces.
Cons - Price, lack of pace, worry that he can be turned easily by pacey attackers.
But he would be a huge upgrade on the chuckle brothers and Rojo. Maguire Tuanzebe Lindelof Bailly, not to bad for CB cover I guess.