Can someone please tell me exactly how much space is available for Sprites
tiles?

I believe is it 32k, but I'm wondering, since 'sprite tile number' in the
OBJ attribute 3 is 9 bits (512). With 8x8 tiles, that makes 32k (512 * 8
*8), but if you are in 16 colors palette mode, it means you could actually
have 1024 sprites tiles in memory but could only access 1/2 of them. That
could suggest OBJ data would be 16k, or that design was made more with 256
colors palettes in mind...

Hopefully I'm not gettign too many things wrong there...

Thanks!