Hamilton systems are usually a little more expensive than they need to be. I'd reccomend checking out Hellolights.com. Also I'd reccomend sticking with a 250w MH over a 175. The price difference is usually really small and in the long run totally worth it. Also I'd use VHO's over PC's simply because they cost less to replace. It all depends on what you are keeping in your tank. I'd always make sure you have more than enough light because then when the SPS bug bites you won't have to upgrade your lights again. Hope this helps.