Well, this post is several months old and I cannot believe nobody replied, but I guess better late than never huh? Hehe.
I will recommend the Wilson Trucker Cellular antenna over anything else on the market. I bought one last year at the recommendation of Chris Sokol and I have been thrilled by the performance thus far.
I actually mostly use mine at home. I live out in a rural area and the nearest cell tower is miles away and the terrain here is hilly. Before getting this antenna, I had no signal here at home at all.
With the antenna, I was boosted to 1-2 bars of signal, which is a pretty dramatic improvement.
But the real gem was the 3 watt amplifier I purchased. With the amp and the Wilson antenna, a phone that use to get no signal here now always maintains 3-4 bars of signal and I have never had a dropped call on my end. I was shocked. It's just like having the old 3 watt analog bagphones pretty much.
But to get this full effect, you need both the antenna and an amp. The antenna costs upwards of $50 and my amp (made by Inteligain) ran around $200. Plus, you'll need an adapter to fit it to the phone, but those are cheap.
IMHO, this was the best investment of 2004 for me and I swear by mine. They really make that much difference! I can only imagine how much your power/signal would be boosted in flat terrain. I now take advantage of my 3500 free night and weekend minutes and also use this cell phone for nowcasting. It has been well worth the money I have invested in it.
I hope this has been helpful. I also apologize for not being around to comment when you posted this back in November. But perhaps it will still be helpful to you or to someone.
-George