I can see the Sears Tower's antennas! (n00b questions)

[vap0rtranz]

OK that subject is a little different but it is true; I live in Chicago and can see the Willis, aka. Sears, tower's two antennas from my dinning room window so I'm needing advice as a n00b to antennas.

The short version of my questions can be summed up in: best a) indoor and b) outdoor antenna for UHF & HD channels less than 10 miles away from an apartment on the 4th floor with line-of-sight to several broadcasters.

For the first part, is there a quasi-directional antenna with like a 40 degree arc for reception?? That's probably not the jargon used here so what I mean is: both this site's Antenna Selector and antennaweb.org's say that all the channels I'm interested in (UHF, HD, 5-6mil) are only 20 degrees from a direction bisecting the arc. ... basically the John Hopkins building and the Sears Tower are 40 degrees apart from my apartment -- so is that arc narrow enough for directional or still needs multidirectional?

Second, are mounts kinda standard? as in, could I swap out a satellite dish and mount an antenna, or use the same drilled holes in the outside of the building? There's a DirectTV dish mounted outside on the brick and happens to be just in arms' length from the dining room window. It'd be great if either the mount or the holes are reusable ... I just can't be drilling holes without risking falling down 3 floors.

[tigerbangs]

if you can see the Sears tower, you may be abl;e to use an indoor antenna: try a Terk HDTVa. It is likely to be as good as the TERK TV 44 that attaches to youur satellite dish, for your purposes