live in new york state, kings county. i am 8 years into a 30-year fha mortgage at 7.5% with a monthly payment of $1185. i do not expect to be in this home for the full term of the mortgage, perhaps 8-10 years. is refinancing to a 30-year conventional mortgage at 6.6%-6.875% a smart thing to do? this would reduce my monthly payments by about $120-140. also, what happens to the equity built up over the 8 years of the existing mortgage if i refinance? is it lost? thank you.