Try Sprint for 30 days...it's the only way you will know if it works for you. If it works you will save a lot of money. I have been with Sprint for about 11 years and am very happy with the service. I use about 3000 minutes a month and can't even remember the last dropped call or area without Sprint service. I am in the Chicago area but I do a fair amount of traveling as well.
I just got the evo Saturday. So far im not really impressed with the coverage. Only 1-3 bars in my house and roaming across town. I love the phone but this lack of signal might not cut it for me.