I like the 2nd one best, seems to have more depth of body than the first. How are they compared to the rest of your heifers, growth wise? This is one of the factors we use in determining replacements -- 205 day weight.
They're nice looking heifers. But if you get black and white spotted calves out of them, the sale barn jockeys may discount them as Holsteins. I'm especially looking at the spotted animal over the back of the baldie in the first picture.
Keep them for, what, replacements? They look okay.. nothing special as you already indicated. But if they're out of good dams, and have the potential to raise a good calf, why not?