When in doubt, knit lace

I posted this question on the knittyboard, but thought I'd solicit more opinions. I had been planning to make my mother a Flower Basket Shawl, but somehow managed to misplace the yarn i was going to use. It's somewhere, I know...along with the other random items that seem to have disappeared during the move. Anyway, I do have a lovely hefty hank of Sea Silk in Mineral (black/browns/grays), and would like to use it for a shawl instead. It's about 150 g and 660 yards...I just don't know if I want to make the FBS with it, since I want to use up most of the skein and it seems like it might end up rather large. So I found few other patterns that might work: Moonlight Sonata Shawl Luna Moth Shawl (has the added benefit of being a reference to The Amazing Adventures of Kavalier and Clay Sea and Shells Stole (basically Print o' the Wave without the edging) Any thoughts?