Decision has been made. I'm making Grace - and maybe I'll have a go a Sigma later in the summer.
Yarn has been purchased. I'm not crazy about wearing mohair - especially in the warmer months, so I've found a cotton yarn (Panda Regal 4 ply shade R18) as a substitute which will probably be a bit drapier and not fuzzy. The colour sample on their website doesn't really do it justice - much prettier in real life.