You only have so many options. I would go with the FLM Hybrids with HB Lightning diffs (not Pro). That would be the best setup for the money. The next best thing is the FLM Combo bulks and some good stock replacement diffs. I personally don't like the stock diffs because you can't tune them with oil....
I have ACNCM bulks, would my best and cheapest option be the maximizer serup. I realise the HB diffs are stronger but I would hate to throw away my aluminum bulks and buy the hybrid setup...