If this thread becomes Sticky then fine, but if not, this IS a subject which many Users are very interested in, and is definitely a needed topic of discussion.
I apologize if someone thinks I'm "stealing their thunder" on this, but frequently topics are suggested, and never followed up on. and I really think this is a viable issue. I'll go another step here, and recommend that when a situation is under discussion, that "whoever" gives a link to a Chart (TVFool would be nice) where we can see some actual
dB's and distances that related to the recommendation made.
So, just to get things started, here's goes...
I had an opportunity to discuss Antenna Choices with illuvatar81 and jlhugh who both live in Wichita Falls, here's the general TVF Chart for them...
Wichita Falls TX 10/2009
Now, given the numbers you can see in the Chart, would you recommend a Pre-Amp for them, and if so, which one? I'm mainly looking at their ABC and FOX stations, being rather low on signal strength.
Have a good Day !

S.W.