Look into Theoreme Innovation's TI SmartLamp 600 ProBloom. See my Sig. I love mine. Check back for my journals and photos I'll be posting...
Haha, damn man. You must have some cash lying around to blow, because that is some serious equipment.
Generally speaking though, LEDs will cost more than HPS. The kind you were talking about are the shitty ones. If you want LEDs that will actually grow anything you need either the one GrowGreenGreen linked, or the UFO, or the Procron (or however you spell it). The cheapest of those would probably be the UFO at around $300-400. I got one off ebay, used, for $200.
The UFO is nice, as it requires about a quarter of the energy and produces nearly none of the heat. However, it's still more expensive than a 250w HPS from HTGsupply.com as you can pick one up for roughly around $100.
If you put the same $100 into those LEDs you were talking about, you would get about 1/2 to 1/4 the growth.