Would using two 600's increase yield significantly in this small area over just one? Or would a 1000w be better. I only have so much to spend on lights at the moment so here are my options.

1 600w hps, 1 400w mh(using cfls to veg atm)
1 1000w hps, 1 400w mh
2 600w hps and continue using cfls for veg


I'm almost leaning towards the first myself. I could use the mh for my mothers and rooted clones, and keep the cfls for added light/new cuttings. Would give me the option of adding on another 600w later on.