home equity loan or refianance to buy airplane?

Read in one of the monthly magazine rags about getting a home equity loan or
refinancing your house and getting cash out to pay for an airplane.

Has anyone actually done this and if so, is this a better option than just
getting a straight aircraft loan.

I'm being quoted 6.75% right now for a 20 year fixed for the amount I want
to borrow for a plane. Refianance companies have said I could get under 6%
if I roll it into my home loan.

Any advice would be great.

Thanks.