Outdoor is always a best option , the best antenna for outdoor or a attic
installation is the channelmaster4221HD 4 bay antenna, Also since you
are going to hook it up to 3 TV's ( the non HD TV needs a converter box)
You need a pre amplifier google channel master titan7777 If you do an attic
install try pointing techniques to find the best reception to get as many channels
as you want, also the higher the better. But Outdoor will give you 30% better
results than a attic especially if you have a open line of sight, and grounding
for lightining protection is also important for outdoor installations. This site
www.tvfool.com will tell you what HD channels you can get with putting your
zip code and where to point.
here is a link for an outdoor antenna
http://overtheair.saveandreplay.com/channel_master_4221HD.asp
and a pre amplifier
http://www.solidsignal.com/pview.asp?p=ANC7777
IF this is too complicated and you just want a indoor setup
and less channels. Then these 2 indoor antennas are the best
indoor antennas I tested out of hundreds of crappy rabbit ears
at best buy or wal mart. But since it's indoor try to put it as high
as possible and try pointing techniques to see what gets you most.
http://www.warepark.com/Antennas-26502/4796208-ZENITH-SILVER-SENSOR/ProductInfo.aspx
this one has a little amplifier with it and you just point at the city to get signals it can get
signals up to 40 miles
same with this one
http://www.warepark.com/Antennas-26502/3718767-PHILIPS-MANT940-INDOOR/ProductInfo.aspx