Forget A2000, slow graphics (Z2). 060 is going to be very expensive, and then you are stuck with slow Zorro2 graphics.
I say go for A1200, it is trusted, reliable and well known hardware. You can do almost anything with it, basic 020 machine to the extreme PPC 256 MB, Z3/PCI slots, Bvision. Your budget decides how extreme you can go with the A1200 but there is really no limit in Amiga hardware terms.
