Any of the 8 bay panel antennas (for example
http://www.solidsignal.com/pview.asp...0Antennas&sku= ) aimed toward the south will provide a substantial channel line-up. The gain of that type antenna is such that you would likely be able to run with no preamp or distribution amplifier even if you choose to split the signal 4 ways.
You may not see much from the north, but the pay off would be that there would no rotator to buy, fight over or replace when it breaks.
If you are lucky the cable TV company may have already placed a splitter / grounding block (
http://www.solidsignal.com/pview.asp...u=615798101992 ,
http://www.solidsignal.com/pview.asp...0Supplies&sku= )outside and wired RG-6 to the locations you need signal. If so, mount the antenna outside, run new RG-6 to the point were the cable company drop connected. (Simply disconnect the cable company's drop to make way for your new feed)