You should draw a bunch of other TV shows detective couples, like Get Smart!, The Avengers, The X-Files, Bones, Warehouse 13... and, why not? Doctor Who. I know there's a lot of famous TV couples, but those are fine to get start.
Oh wow, this is cool! I'm a big fan of SVU and I think you did a great job here! Just one thing. Olivia looks just about perfect, but I think you made Elliot look a little too mean. xP I know he's a tough guy and short-tempered and all, but yeah.
I also feel awkward for pointing this out, but Olivia's breasts should be somewhat bigger too. Not THAT much bigger, though.