Joseluis,

getting styles from other keyboards is not an issue for any brand. If you can not get them on the Net, the french company USB sells a CD compilation of them very inexpensively.

You should remember, though, that most styles sound best on the instruments they were created on, as despite all the GM compatibility claims, the voices and drums on each sound slightly different. Also, instruments like Solton use "groove" feature, where the drums are actually recorded as audio - this causes groove styles to sound wierd on other instruments unless you edit them. So, I would recommend that you look for an instrument with a good complement of styles built-in or available in the native format.

Regards,
Alex