I just discovered Rabia Z! She's an American-Afghani hijab-esque (I say esque, because not all of her pieces are full on hijab) designer. Rabia specializes in "moderate" hijab and abaya design, which I don't exactly agree with, but I still think a lot of her designs are beautiful, and they aren't sell your kidney expensive. Her abayaat have a sort of sporty, modern feel with the stretchy fabrics and color-blocking. Very on target, especially for younger hijabis.
I like the Ruby pieces, but I think you would have to be careful when ya style them. Baggy baggy pants/and or maxi skirts for this girl. :) Or, just for comfy clothes under an abaya....