Gonna sleep on this

I have almost decided that if I am to make Mariah, I need to make in cotton. So, I have found this eBay from UK and I can get 10 balls of Jaeger Trinity (silk, cotton and polyamide fibre) for less than $40, all the yarn I need.
So what am I waiting for? Cannot decide betwen violet and indigo. No suggestion that I get both, please, I promise - well, I said to my husband i was going on a yarn diet to justify the purchase of a cherry chest for my yarn.
I am going to sleep on it ....