Personally, I've never liked the look of entralac; however, with that said, it seems to be most suited for blocks of different colors. At least that's how I've usually seen it worked up.
Plus, I'll vote for simplicity over intricate any day.
As far as trendy goes, that I am not. I just know what I like.
So, I would go with straight stockinette. But by all means, wait for others to chime in; then take the final vote, mix in a grain of salt, divide by 14, and then do what you want to!