a home studio vocal booth, I'm trying to put one together

I'm trying to build a vocal booth for my modest home studio. I have been doing some internet research (for what it's worth) and came up with, maybe, a decent option...

- I figured I would just spend the money on a studio foam kit, or two, and use the corner of the room as sort of a half built booth (stay with me) soundproof that corner and then, find another L shaped type of wall device (I don't exactly know what yet) place it against the corner, and then soundproof the moveable piece, creating a square vocal booth area about 4ft X4ft, or somthing close.

- another I have been thinking of is a "soft" booth, with thick blankets or quilt like material, fixed to the wall corner and then draped over the L shaped piece (of whatever) to deaden standing sound waves and record less of the room than I currently am...

both of these ideas are in a very elementary stage, and still stand the possibility of being scraped altogether. I worry that both ideas run the risk of killing the hi-end in the vocal recording...

anyone have any advice on materials, concept, size, anything???? i'm wide open for suggestions

*** FYI, I record mostly hip-hop vocals, the occasional singer