There are many examples on houzz of contrasting counters for perimeter and island. For example butcher block on island and stone on perimeter or a solid color on one and something with movement on another. I would only mix two stones if one had movement and one was fairly solid. The stainless on perimeter and something else on island sounds good to me. Here is a pic of stainless counters with what looks like a stone breakfast bar. (I hope I understood your question right). http://houzz.com/photos/3137660

Depending on functionality, how your island is used, it can be somewhere to showcase a different material, as in a traditional kitchen with a substantial timber top, or if it's a practical prep area, the durability and maintenance is of utmost importance. If it is a highly utilized work area the surface would be best suited to reconstituted stones, which are man made such as Caesarstone, essastone, quarel la etc, as natural stones such as granites and marbles are more porous and require some maintenance and care. Depending on form and style, your options are almost endless. Cntemporary spaces can indulge in stainless steel tops, acrylic solid surface tops that can be any thickness, profile and can actually be repaired without joints. Glass or concrete are more options. So you ask for help on choosing your island bench top, That is dependent on a great many things. Factor in how you would use is surface, and what you can afford, then think about the overall impact these options can provide on the entire space. Eliminate. And collect samples to make your decision. It will probably become the single most used space in the house.

Your suggestions are really greatly appreciated. My town house unit is under complete exterior re-cladding works, prompting quite substantial interior makeover (i.e installtion of ducted air con, replacing wall to wall carpet with timber upstairs, and tiles in open space downstaris, replacing creamy wall paper will be replaced with neutral white paint. So my green kitchen with creamy formica counter (bench) top should go. I don't hate green simply had egounh of it after long 15 yeras! My small U shape kitchen is due for complete makeover, I think! I'll probably go with new cabinets (lower one for microwave) up to the ceiling, when move fridge at the end I'll go with panel with matching colour up to the ceiling, expanding counter top on the other side to the fridge. I guess that removal of the cupboard can be compesated with extension of the counter top so we can fit 3x drawer underneath and cabinets up to the ceiling can provide some useful storage space. Backsplash in same white palette or darker in contrast? Your kind ideas please!

The all black kitchen looks scary as. Maybe because there's no lightness in there at all.