A three-way splitter directly off the antenna should be fine. What antenna you use is governed by where your broadcast towers are located. If they are all in one location, you can use a very directional antenna.
Be careful to observe what frequencies your local stations will broadcast on after the digital transition. tvfool.com may help you figure out whether a UHF antenna will get everything or whether you need a VHF/UHF combination antenna.
Be careful to observe what frequencies your local stations will broadcast on after the digital transition. tvfool.com may help you figure out whether a UHF antenna will get everything or whether you need a VHF/UHF combination antenna.