Thanks for the replies.

The problem that I am finding here in northern CA is that the granite
"pros" will nly do work on the materials that they sell you and not on
your own. The price differential is huge. Best quote I found for
pretty common granite was $1,500. There is a place that sells
prefinished slabs including backsplash and their price is $300.
There's no way that making a fer straight cuts is worth $1,200 to me.

In fact the total cost of the island (including granite) won't be near
$1,500.

Thanks for the input.