I used to own the roland xp10 many years ago ,however i wasnt happy with it in the end due to the sounds of today forever changing modern music ,If you wish to have some contemp sounds then the xp10 maybe what your looking for ,it does have a few mods to alter the sound shaping ,if im correct the roland did revamp the xp10 and now call it a juno which has the same body but with a diffrent sound engine inside it.
if your looking for multi part sequencing on a budget then go for the xp10 but dont expect any dance sounds from it is all i have to say ....the korg x5 would be a better choice i think with multi oscars and a good drum set inside too boot
Hope this helps