Yeah it looks like it has everything you want in a killy list, you have the lasguns and hellhounds for groups and the lascannons for the big nasties. You have 10 lascannons in a 1500 list, maybe h bolter/flamer in the line squads? Flamers are awesome in this edition.
This is a personal pref but powerfists aren't as good as they used to be. Your going to be str 6 so your still wounding most things on a 3, the advantage is the 6+ SM equivalent save then. Since its with company commanders you might be better off giving them plasma pistol/power axe. You get the plasma shot in the shooting phase of CC and the power axe wounds most things on a 3-4.