Yes, what colors do you like is right! You can go almost any direction that you want with such a neutral color couch! Smart move!

How light is the room? I think if you have some oriental pieces the teal would work better. Maybe if you could post some pictures of the room we could get a better idea? You can buy kimono hangers or make one: http://www.ebay.com/bhp/kimono-hanger

Leather is good as a wipe-clean option if you have kids for example but generally I'm not so keen. Leather will naturally wear/crease wherever someone sits the most so they won't stay looking good for as long as other fabric sofa's. They can also get very hot and sweaty to sit in when its warm. I would also suggest getting a nice large rug to soften off all the hard tile underfoot!

Pick a gold/sand from that ornico. A warm color for the walls, look up the paint color for cashmere and go two shades darker. Backsplash doesn't have to be orange LOL, could be black/graphite to make the island stand out more and make the hood blend in (if you have plenty of leds under those upper cabs?) Gold goes really well with cashmir and graphite.