How Hard Is It To Get A Mortgage Because Of Subprime Lending Issues?

I am looking to purchase my first home in the summer with my brother. We both make very good salaries, but we’re trying to steer towards an 80/20 loan. I was figuring an interest rate somewehere in the 6.5%/8.25% area for the 80/20 respectively. Also, we will both be below the 28% PITI threshold, and 36% DTI threshold. We both have great credit (both over 700), and over 5 years credit history. However, we don’t have enough for a 5% down payment in our market. Are these interest rates realistic? Is it even possible to get an 80/20 loan now due to tightenings in the mortgage industry? What would be the best way to obtain the loan, through an online site or through a mortgage consultant?