The Orion was neat because they could shut down 2 of the engines to conserve fuel for extended loiter periods. I had the chance to see one flying at an airshow and it was definitely cool.
I remember an awesome high speed pass and then a very steep climb and turn...was trult amazing. However, it is likely getting a bit long in the tooth so to speak.
It might be interesting as to the the capability of a B737 type aircraft with the high bypass turbo fans.