You are just about 60 miles from the Shoreview transmitters in MSP, and those transmitters put a weak, but still usable signal over your area. You also have signals from Mankato, MN and Mason City IA, available to you whith a deep-fringe antenna system and rotator.
I recommend using a 2-antenna system consisting of an AntennaCraft Y-10-7-13 for VHF reception, and an AntennasDirect XG-91 for UHF. The UHF antenna should be mounted above the rotator, at least 4' above the VHF antenna, and the two antennas should be coupled using a Channel Master Titan 7777 preamplifier. I would ise all new RG-6u coaxial cable, and use a Channel Master 9521a rotator to turn the antenna array. You will see all of the Minneapolis-St. Paul stations plus stations from other areas with this antenna system. Follow the installation instructions listed below, and you should be very successful
http://www.antennacraft.comhttp://www.antennasdirect.comhttp://www.channelmaster.comhttp://manuals.solidsignal.com/AntInstallGuide.pdf