I'm the same. I love my Roland FP90 (same keybed and piano sounds as your 2000 ) and I love the portability and sounds of my BK9. The solution is you have to sacrifice something. My goto is the BK9. Excellent piano and other sounds. Great Hammond. Its light and I've got my Styles edited to where I need them. And having the semi weighted touch of the BK9 I'm comfortable playing piano or organ sounds.
So the FP90 stays at home to keep the chops up and just enjoy playing an almost real piano. I love playing that keyboard.
Do what Donny and Chas said. The Genos is all you need to cover any gig situation.