Actually , I wouldn't even call San An a 'clubbing' place at all.. more of a getting pissed place.
I stayed in pdb my first 3 years... then this year, for the first time, I stayed in San an for 3 nights before my friends arrived , as it was cheaper to get a place there on my own ( and I could book something for less than 7 nights!) and then moved over to pdb after that for the remainder of my holiday.
I gave it a try, but will never go back... its not like pdb is the classiest place on earth either, is more 'clubbing' oriented than san an IMO
PDB has bora bora, space, is closer to ibiza town ( pacha) and easier to get out of and away from.
I will not stay in San an again, not my scene, nor do I like it very much,