Like many others, i have been jumping back and forth with many of the major players in the content management portfolio sites like Zen, Smugmug, Squarespace and others.
Nothing really suited me in terms of designs/themes and costs. I found 4ormat by mistake, and their themes are really good. All tailored for web, tablet and mobile.
It's cheaper too than most of the others and I signed up for it. I'm not affiliated in anyway to them, and I don't want to splash my URL about cause it's not finished yet, but it's worth a consideration to anyone sitting on the fence.
You can use your own custom domain too with any of the packages. Something you pay a premium for on other sites.