Advice wanted on granite choice

We are doing a partial and very budget minded remodel of our kitchen. We've added a large window, moved some appliances and cabinets but we're keeping our old cabinets (white painted wood with nice glass doors on upper cabinets), floor (rubber or vinyl terracotta looking tile) and appliances (stainless refrigerator-new, stainless sink-large double with built in drainboards, white dishwashers, white double wall ovens). The previous owners installed granite around the large cooktop on a peninsula (extends out from a plain wall--no abutting counters) which we think is verde peacock--looks like a greenish black with some shiny cream specks and rust specks. We want to replace the laminate perimeter counters with granite. Should we go with verde peacock knowing we won't get an exact match (the samples I've seen are greener than our existing granite) or should we use a different granite and if so, what? One counter would be about 12 feet long going into an L shape to abut the left side of the sink with about 2 feet as the bottom of the L and then 4 feet of counter on the other side of the sink ending at the wall ovens. Your suggestions are greatly appreciated.
Laja