I love my OPI nail polish! Here I am wearing OPI Sweet Heart (baby pink) and OPI Pink Yet Lavender (pink glitter). For a unique, modern look, paint your fourth nail a different colour. This would have also looked good with white polish, instead of glitter.
I find that my OPI nail polish goes on really smoothly, has strong colour with only one coat of paint (see photo), and lasts for around a week!