With respect to the last post...I think the radio that fits YOU best in the area where YOU are at is what you are after.
There are 2 very good and popular radios out there right now (by consensus)
Telus 1.04 and the Sprint 1.11
I've personally tried both and the difference for me was night and day. I am using Sprint 1.11. Call quality was better, signal strength was better, data up/down was better AND heat was NOT an issue.
Now, I am located in Southern California...as for you the Telus may work better. Bottom line is try them both, and see which you prefer. Better yet, try them all...and get a feel for them. Just make sure you follow the instructions on HOW to flash your radio.
Remember to unlock your phone first!!
http://forum.ppcgeeks.com/showthread.php?t=42503
Then go here for the radios...
http://forum.ppcgeeks.com/showthread.php?t=46616
And after you get addicted to "playing" with your phone...and want to try ROMs...GO HERE...
http://forum.ppcgeeks.com/showthread.php?t=43266
You'll find that custom ROMs will give you a much BIGGER BANG than what the stock ROM can and will give you.
