i totally play with my yarn. i love mixing it up. i have some super expensive yarns and some $1 novelty yarns. and i'm not afraid to use em together. <img alt="" class="inlineimg" src="http://www.mothering.com/discussions/images/smilies/thumb.gif" style="border:0px solid;" title="thumbs up">
Depending on the base you got, I totally would. Cestari sells solids, too. Lion Brand wool is a bit thicker, so, it might be a nice compliment to an aran weight yarn, too. And, of course, you can knit up longies or shorties without any trim if you have enough (if that is your project)!