The four we have added bring several qualities to the squad that we have been short on. Even if we only field two at any time, the others will be on the bench should circumstances demand them. With Bale however, he's one kick away from being put out of the game for good, and that's £100m right down the Swanee.
Someone here mentioned that the £100m is worth spending on one player if his recruitment opens the floodgates to incoming cash. That would have been fine if the player concerned had been the media darling, David Beckham, who was a good player but never a great one, yet he was in the right place at the right time, and with a face fit to launch a thousand tugboats, he was sure to pull in the money at whichever club he was to be adopted by. Unfortunately for Bale, his profile is lower, and his mug isn't one for the advertising companies to latch on to in a serious way.
It was also mentioned elsewhere that Bale would make the Real Madrid team complete, something that he wouldn't do at City unless a couple of gaps had been sorted out first. I don't think this 'completing' argument carries much weight. There's talk of Ronaldo, and maybe others, being allowed to leave for less than the incoming Bale, and I would suggest that Real will be weakened by this, and probably £20m the poorer for it. I remember the time when City were topping the League with a team that looked fairly complete, only for Malcolm Allison to demand the signing of Rodney Marsh to add the icing to the cake, but it all fell apart from then on. This is something that could happen to Real if things go wrong with Bale, and I would further suggest that the four we have signed, even if one or two don't live up to full expectation, will still be a better bet than stacking it all on Bale.