Well it depends on what you want to keep, figure that out and we can advise on the best lighting. For a budget of 600, if you can't find MH on Ebay, you may be able to DIY for that, but with the budget, you'll have to stick to PC or VHO. As for champions pic...I saw some LPS lot's of softies and some very hardy SPS (M. digitata) which is known to be very acceptng of lower lighting, and also has a very nice habit of coloring very well under VHO. There are many SPS that can be grown under VHO and PC, even at the wattages suggested.