I just realized that the interest of Home equity loan is much higher than mortgage loans :(. Look at the interests: (from Yahoo! Finance 10/18/2011)
So actually it is not a good decision to trade off my student loans with the Home Equity Loan/HELOC. Historically, the interest of 5.66% or 4.27% is low, but not as much as I want it to be. I may consider the 4.27% but still have to look closely on the loan fees. What you do think?