Pashmee,
I think I need to follow up with this by saying, my personal preference may have skewed my view of your original need. As quoted above: Your looking for a "beefed-up replacement for your 530" without a doubt puting that in the proper context, your best bet would be the 2000. Its a huge step up with all that you will need for the use you described. Although you read alot of complaints from people who are somewhat dissatisfied, I believe many are using their machines in a professional manor. I have enjoyed the limited time I have had to play the 2000. While it's not the same keybaord as my 9000, it will probably meet all your needs.

Regards,

Dennis