Try adding some Intrigue roses... the color will compliment the purple smoke trees admirably. I would mix those with Queen Elizabeth, Moonstone, Golden Masterpiece, Golden Spirit Smoke Bush, Sunshine Bluebeards, Basket of Gold, Julia Child... that sort of color scheme. I'd stay away from the "hotter" colors, such as Strike it Rich, Charisma, Gingersnap, Mr.L, etc. Also, you don't want to mix it in with the more softer mauve roses like Blue Girl / Sterling Silver. You could use Stainless Steel if you can find one.
