Reaching out into the realm of even more expensive cruise missles, there is work underway for a missle called the RATTLRS, which has the basic aerodynamic shape of an engine nacele from an SR-71, complete with aero-spike and virtually nothing else. Speeds capable of an estimated 3.5 Mach, using high-temperature turbine technology. A picture of the missle was printed in Scientific American, but I have not yet been able to locate one on the web.

Explosive payload is 250 lbs. Jane's will probably have more info as it nears production.

Picture!

RATTLRS Cruise Missile is Turbine Based