This is hard. I have zero interest in or knowledge of the corsets, personally. I've considered the Eleven many times, and the Gigi is awesome. Quality lube is more of a revelation in toys than is a book, imho.
Okay, if I had, say, $400 to spend, and zero toys, I'd go with: the Little Chroma (which you probably want to ignore, it's just my favorite and I'd replace it instantly if something happened to it, and same with the Sasi, which I don't think you want to rec right now either), Lelo Gigi, some of the SSA Glass toys (probably the Deep Water G, the Amethyst, and the Cyclone), a nice metal toy that's not the Eleven, like perhaps the Dai-do #3 (which I just ordered) or an Alumina toy, and one of the Fun Factory vibes -- the Bubbles being an excellent choice.
I think the Eleven is awesome, but it eats up an awful lot of a budget, and limits the variety of the package. However, the Eleven, the Gigi, and a couple of small items would certainly be a nice treat, too.
And that's my unhelpful two cents.