My vote (although all the options sound great) is for the poplin pelisse, maybe trimmed with green or blue or a blue-y green or a green-y blue, so that it's not too matchy with the bonnet. Which would also leave you the option of retrimming the red linen spencer should the weather be too hot for the pelisse, since that sounds like less work than the other options. But of course all plans are subject to change and the whims of the seamstress!
no subject
My vote (although all the options sound great) is for the poplin pelisse, maybe trimmed with green or blue or a blue-y green or a green-y blue, so that it's not too matchy with the bonnet. Which would also leave you the option of retrimming the red linen spencer should the weather be too hot for the pelisse, since that sounds like less work than the other options. But of course all plans are subject to change and the whims of the seamstress!