I have to ask if you are actually experiencing problems like dropped calls, poor quality, etc or is it just poor signal strength on the indicator?
The reason for that is a lot of companies use different formulas to arrive at their indicator level. IMO, Apple overrates theirs and they basically admitted they were changing the way it reads to reflect a better service indication whether that actually is or isn't the case due to the antenna issue.
Don't get me worng it really does depend on your location and situation but if that is the case, my EVO rarely reads at full strength, my previous phones all seemed to read higher yet the EVO is still the best phone I have ever owned as far as actual call quality, sending and receiving, lack of drops, etc, etc.
In my area I have a few excellent coverage spots as well as very poor one's and the phone does everything at 0-1 bars as it does with 6 and with very little decrease in performance. That even includes when roaming, which I believe is done on Verizon towers so I don't know if going with them makes a huge difference.