That's a huge tree! It's not going to be cheap, but it will probably raise your property values to have something like that removed. I'd call around a few difference companies and have them give you estimates. Then you can decide who to go with from there. http://www.brandywinetree.net/
The coists can vary, depending on who you call and the equiptment they use. Here's my advice - if it's close to the house, you can't pay enough. Get the guys with the big cranes and stuff. Also, make darn sure they are insured.