Sounds good so far Sam1969. You will definately need more live rock but you already know that
Maybe try and post a couple of pictures and people will be able to help you out a bit.
One thing you will have to be mindful of with 2 250W MH lights over a 44g tank is that you will have to manage heat and there are a variety of ways to do that from a chiller to fans to ice to....etc..... you get the picture.