6g is pretty darn small, and I think even with the JBJ 70 halide you'll have heating problems. Sunpods don't come in 70W.
I was thinking about getting the JBJ halides, but decided to go with PFO. Some bad points to JBJ is that the bendable arm that stretches over the tank is very flimsy, the reflector is essentially just a flat piece of cheap reflective material, the ballast is huge, and the stock bulbs are very dim. You get what you pay for.