The logo on its own wouldn't get the name out and brand awareness desired. I do like how sleek the name on its own looks, but the logo I feel is also an essential part of the brand. My favourite design would be either #4 on the front with #3 on the back, or #4 on the front with the logo (not super large) next to the name or below it. Given this isn't an option I would choose #1 so it has both the name and the logo. #1 also is still sleek and classy because it is smaller in size.