Just on a more contemplative note to add a historical glance to the question (I've noticed that this thread is showing the tell-tale symptoms of a full-blown Circus of Wummery), how many home-grown players have actually made it over in Spain?
Woodgate, Owen, Mcmanamanmanamanaman, our very own Vinny Samways.....
Not exactly a role-call of success. In fact, it could be argued that the move to Spain more or less ruined these players' otherwise promising careers.
Off the top of my head, I believe the ONLY British player to play for Barca in recent memory was Gary Lineker, who played for them before he saw the light and moved to Spurs. He actually did quite well there, scoring 40+ goals in around 100 apps.
However, the BIG difference between Lineker at that stage and Bale at this stage is that Lineker had already been playing at the highest level for a good 7 years, and only moved at the age of 26, having already scored well over 200 goals for Leicester and Everton. As good as Gareth now is, I don't think his professional shoulders are yet broad enough to cope with this sort of move.
Just some thoughts...