ahhh... my favourite topic in the whole world....
since you like plum purples, you might want to look at Trax and Plum Dressing.
a good highlight eye shadow is Naked Lunch. but if you're looking for a lighter purple, Beautiful Iris is a lovely choice.
my favourite concealer for around the eyes is Select Cover-up in the small tube.
i don't actually like MAC mascara - i find it clumps way too much.
let me know if i can help with anything else.