I started swatching Decimal this evening with KnitPicks Gloss and US Size 2 needles. So far, so good, although I haven't really measured the swatch yet.
I think I'm going to stick with Gloss for this sweater. I like Shine Sport, but I know it will take US Size 1 needles, and I really don't want to knit an entire sweater with such tiny needles. I have to draw the line somewhere. It just doesn't feel good with the yarn.
I'm not positive I'm going to stick with this color, "Cosmos." If I was really brave I'd use "Parsley." I think it would bring out my eyes, although I normally don't gravitate to those muted colors. It'd be a brave move to order so much yarn in that color.