If there is any chance of scratching the paint, then DON'T GO WITH PEARL. Ask a painter how easy it is to touch up pearl and he'll probably laugh. Easier to repaint the helicopter sometimes!! Agree with a nice metallic grey or gun metal grey. They look cool! Even metallic can be difficult to touch up after damage though. If it corporate, probably OK, if it Aerial Work, perhaps you need a more practical paint scheme.
Just my 2 cents :-)
noooby