I would get cfl's bro. Even a 150 watt hps will not warrant your yields in money equivalent for a few grows down the road, with the extra bells and whistles that need investing into when going HID. The heat is unreal man... CFl's once you have a couple hundred watts worth, even they start to roast. I have a 800 watt home made fixture with cfl's, that gets HOT AS FUCK! but no where near as hot as a 1000 watt HPS. That shit burns my head when im leaning under it, like the damn sun if i shave my noggin.