As it turns out, I had a little more blue and purple than I had white, so I did a little bit of those two colours as well as a skein of the three. They all turned out to be really pretty. I will say that I loooove spinning merino as much as I love knitting with it. It's so soft and gorgeous. The shropshire was also pretty nice, but the shetland has spun up very coarse. It feels a lot like the aran yarn I've been working with from Sheepfold Aran. The aran is known for its felting properties, so I imagine this might felt well also. I'm not quite sure what I'm going to make with the yarn yet, but when I know I'll be sure to post it here.
I'm very pleased with how much better my yarn is looking. It's getting to the point where I can do create yarn that's pretty even, for the most part. They aren't kidding when they say practice pays off.