Telmo,
I don't know if this has been suggested to you, but I'll throw it in the mix. I have friends that like to compose new age music, and I play with it every so often as well.

Here's a trick they do on their arrangers (as I've done on my synths). Take the DRUM part of s style in the Club, Techno, Dance, Drums&Bass, and other electronic genres and "slow down the tempos". Doing this can bring about some pretty cool results. Then you can go even further by adding your own bass lines, free flowing ambient pads, and even EQ'ing and adding effects to the drums themselves--you just may end up tripping yourself out EQ'ing and adding effects to the drums

It's a possible solution for you. Then you could just keep your PSR-3000, and seek out other electronic styles. I've slowed the tempo down on these types of beats on my synths, and did some tweeking, and got some amazing results.

Anywho, just another possible avenue for you to consider--This way you "save money" because you can still edit the voices on your PSR, and create some nice custom patches (or tones) to use with this style of music. Personally I think you can get some good "new age" style music from the PSR-3000.

Squeak