This is how I would approach this. I have had a BM, a SGB, and a SFP suit so I have a good perspective. GO with SGB if you live in a warm climate (I live in Florida). If you live in a cooler climate or where the seasons are dramatically different (like snow in the winter), go with BM. SGB suits are thinner so better suited to hot climates and BM suits are thicker for temperate areas. If you are thinking about a SFP suit, go hit yourself in the head with a tack hammer because it takes forever to get if you get it at all.