If you're referring to the rumor posted
here, then Bruno has already pointed out
here that the source is unreliable. Even Tim Varner has retracted it in his blog post
here. In actuality, Real Madrid's offer, should they actually make one, will be well below those numbers indicated in your post. As such, there's plenty of reason to be optimistic about Splitter coming to the Spurs.
They can offer him more money, and they can entice him with the prospect of playing in the world's best basketball league, something I believe Splitter will be hard pressed to pass up.
By the way, speaking of numbers,
what number do you think Splitter will be drafted if he had been in the NBA draft this year instead of in 2007 and if his contract wasn't an issue? That is, he's amenable to signing a rookie scale contract and his buyout with Caja Laboral wouldn't be an issue.