As for my thoughts on making our own modpack, I'm not entirely sure, on the upside as has been said before, we choose the mods included (I know I would like to get thaumcraft in if possible, I was just watching direwolf and there are a few changes coming in 1.6.2), on the downside, we have to figure out any bugs ourselves really, due to the different combinations of mods and all that. Plus like uber said, we have to keep it up to date ourselves. Whatever we end up doing, we would not have to restart the map, I have a few tricks that can change id's over as needed, and I am sure I could figure out how to do reverse ore gen