Depending on where you want to stay, you might look into the Kanya Beach Resort: www.kanyabeachresort.com . It's located in Sant Antoni (the British frequented "West End" side of Ibiza).
I stayed on the other side of the island last year, in Playa d'en Bossa. Space is within walking distance of most of the hotels in Playa d'en Bossa, but most of the other clubs (Privilege, Amnesia, Pacha) are quite some distance away. Party buses go to most of these clubs, but they run about every hour and a half, so there's a looong wait if you miss one. So, whether you're staying in Sant Antoni or Playa d'en Bossa, it's still a long bus ride to most of the clubs.
Many people prefer Playa d'en Bossa, but I visited Sant Antoni one day and had a great time there, even wished I had more time to spend around the West End area with all the bars and cafes. Accomodations are a lot cheaper on this side of the island, and I wound up eating English Breakfast quite a bit while in Playa d'en Bossa anyway!
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