I need to buy two new ballasts. I was looking researching last night and found many people using M56? Ballasts to run their lights. It is certainly a lot more cost effective to do so, but that doesn't make it the best idea. I found them on 1000bulbs from $35-$65 dollars. That doesn't include a housing or fan, just the transformer, cap, and starter.
I looked for the recommended M80 ballasts and they are certainly more costly. I will do more research before I buy anything, unless I find a great deal on M80 ballasts. I now need two 250watt ballasts.