Personally I like all 3 colors, fawn, brindle and white, whether flashy or plain. But if I had to pick, my first choice would be white, then brindle and then fawn, I also tend to lean towards plain as opposed to flashy, but at the end of the day they are all beautiful and I think a choice should be based on the personality of the dog not the color.
Which ever you choose I am sure you will be happy with your choice.