I would buy the XP30 either, actually I own one and am quite happy with it. If you´re looking for good acoustic sounds, the XP30 has them. The session board has some great piano sounds, the orchestral board has as much good sounding strings as you want. The techno card is not the best. Especially if you like techno, you might be a bit disappointed, however it delivers a good basic set of tr-drum sounds.

If the 1500 sounds aren´t enough and you like organs and e-piano sounds, than get the 60ies&70ies-expansion card.

Shima